Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cd7fa4936a738c…

MALICIOUS

PDF

88.1 KB Created: 2021-06-30 00:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d16ba7db3805d769a995f9b315d78a3b SHA-1: d4f83a87994c124fcfb93345b9eedc2a89eced9a SHA-256: 14cd7fa4936a738c88393160006974fb42eaf269ef082d3cc1d5fbe71af05e5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on potentially compromised or disposable domains. This suggests the PDF is likely used for SEO manipulation or as a lure to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=white+black+and+grey PDF link annotation
    • http://grawerlik.pl/userfiles/file/fumofenapuker.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/jabiwubemorosonif.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210616_7C054C84B522B182.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717ad9d60d8---38806010481.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ddc577db5---mifufaredonukaxivu.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e06101a7aaf42325d71b6172a14c7177/xufiler.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/78443495225.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/pererejozuxure.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb79c6df2d---45034634004.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/mezoroxabidilifow.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/vajutigowanudo.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/fa778d0671d7a7574d47571250a57bfc/vutorubuxijalatixizuxu.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/fdcnhi57a7a1hhuah1mpcla2r2/39085893144.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d53db404f20---wuguwezemi.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c11389e1291---7556148842.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/vivigedemogifukekodifu.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/m8urbqg0pafo4mkkrkqat9pbgk/rulofujagipevewitim.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/lepiwebugivurarete.pdfIn PDF document text
    • http://gptools.net/userfiles/file/35672554027.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/wagaxowivugunebusigovo.pdfIn PDF document text
    • http://belgium-ex.com/3180999241.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c10a57037---selen.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/43945183599.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/zevasilizopudamozen.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/8obr49ov13bhmcvvffp295kd4t/96293606605.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa9a78239a---zasagolumaxupesesomijava.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 10700 bytes
SHA-256: c5aadaa81c710e86ba8f98f3dcbd97f7c01a4263a71cf4fceb5398d4985e8af0
font_02_sfnt_off000125da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DA 17336 bytes
SHA-256: b59c30c3a7ea9b8ed623bba45a4a4aedb37250f7373cca2acfcfe2b8a45a66a7

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