Malicious PDF — malware analysis report

Static analysis result for SHA-256 967b5f2905ed3063…

MALICIOUS

PDF

72.5 KB Created: 2021-09-17 16:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3cd5553ecb1b4aef63b00e7505d1c573 SHA-1: cc7112022b39ec5eced91f940531923535dcf7ea SHA-256: 967b5f2905ed306325480e7490a168c04ea85325657efb064918cefa64a11cf0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including a link farm hosted on disposable domains and links pointing to compromised WordPress upload storage, suggesting it's used to redirect users to potentially malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://pixomot.ru/uplcv?utm_term=music+editor+mod+apk PDF link annotation
    • http://www.vikingmaterials.com/img/81895675106.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/mexadapimomamu.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/dabuvokenivugij.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/72781316370.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/77047806993.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/3hmk7q0cs64n9cvsr9cgspisc2/70177516206.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/68928716131.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/71312414510.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/15417495510.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/41532659130.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/34344d38509c5f956eaec0e1c8d3795d/logadakimop.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/xokedogizonozozalor.pdfIn PDF document text
    • https://tamphuctriland.vn/upload/files/gajemukaxuvelaxefufevux.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/jn6e6cmtf7s5037eba618f8vuc/texilowejaredafufa.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/95347471309.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/14044182475.pdfIn PDF document text
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/kevevod.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/79100457250.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/bowunimagidakir.pdfIn PDF document text
    • https://media-get.com/userfiles/files/mosamagupumuzug.pdfIn PDF document text
    • http://potya.com/93575694323.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/58764478385.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/31538876522.pdfIn PDF document text
    • http://hbaoge.com/upload/files/23552852639.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/fetutu.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/71076354974.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/tigujizopapawufisizif.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_off0000bb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0B 10712 bytes
SHA-256: 1835543e819758c06a63f557d5a8dcf631dba328b2c56136c3ae9ba50ebcc5ed
font_01_sfnt_off0000d3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B8 15844 bytes
SHA-256: c8cc9c60679e45d062f5ec74eaf32d9e31b974673d6a70e3b738f28c909c3631
font_02_sfnt_off0000fbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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