Malicious PDF — malware analysis report

Static analysis result for SHA-256 607b37ddf003472e…

MALICIOUS

PDF

127.1 KB Created: 2021-06-26 09:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 82ae96154bb327ba844e1c07bbb38553 SHA-1: 742799b0d65f7c11b70ff84e56b80e99745baf7f SHA-256: 607b37ddf003472ee33bbc9cbfb0924ea83b103bdf826596a1f1fc3b4e203d6e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document may instruct users to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://infrive.ru/uplcv?utm_term=st+columba%27s+by+the+castle PDF link annotation
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/dkv89l14tql2kmp6n2s1u3v9pl/24375208142.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/66641979241.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/suxujosaroza.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/23po66l5btpgf3v56rlgti6s34/rozanasuzasamogufumabav.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/pljcsqq74un6givle51gfuuvd2/60421841141.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/87c2b4c3caf52d61aaed9eaac723baad/gofogosepepofuwagolukugu.pdfIn PDF document text
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/titokulokijijokegupen.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/1021538589.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db342f3d07---kodakuwonaweturigefen.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a90f1b6960---80563722147.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b88b55c74---xepokolokixegibuzifav.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a91a112d661---janoregonifosesopivefe.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090660a50e06---ralumoboxunoju.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71c18361d---kedukadagejakaji.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/92720109498.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/74425924054.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca00c8dd06---woludewef.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/3100d5affcaa3d0fc09e803821fd3d52/lazizikun.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071fc745ec82---rodafapewidu.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/95pjc2n5vlvm84e1juc4n4up8q/samoxobulegegazonate.pdfIn PDF document text
    • http://jaika.in/images/documents/files/95230665058.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/7cp1sggieihq9mn7ituvhba062/50603192766.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/f3da82b2c700e67ad8ec143d4c277c8a/pujesomadusugimono.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/pejunutitefagum.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/32677606070.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17506 5360 bytes
SHA-256: 8d44a8d579dac5b1b144d69bca6401eed1dd2fa75954191cf866a3f9bf5f2f14
font_01_sfnt_off00018893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18893 10664 bytes
SHA-256: aa3f2a51c8dde8624747677eddc11b34bf7410286591b1ff3179ffc9f28a9a1b
font_02_sfnt_off0001a12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A12A 19828 bytes
SHA-256: 1834d43321c694d913f4f28f42c6eb4b2a8e42aef73c49bc2c1d8712be203065
font_03_sfnt_off0001d510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D510 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.