Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7d03b07420b84e…

MALICIOUS

PDF

85.1 KB Created: 2021-04-17 11:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 86d96cbc11cbf3c449deac8c701e90ed SHA-1: 627eddb2570971ffe4f14f490be638cdb76dfcac SHA-256: ed7d03b07420b84e9db1b53300c4919fcdf74552a8decad663387b5eaa214d63
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags this behavior, and the presence of external URIs further supports this. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=stihl+025+chainsaw+blade PDF link annotation
    • http://pop-marketplace.ru/formule_pizza_bowling_colomiers29dny.pdfIn PDF document text
    • http://dvigatel.guru/kenmore_sewing_machine_158.432_manual9thh6.pdfIn PDF document text
    • http://walletelectrum.buzz/mebusobokaguip0ld.pdfIn PDF document text
    • http://tizuwaborew.22web.org/67126712410.pdfIn PDF document text
    • http://goldenframecollision.com/45386089418j7q6a.pdfIn PDF document text
    • http://juwijetuwi.22web.org/al_islam_quran.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_6036b5f13842e.pdfIn PDF document text
    • http://geniusenglish.space/queen_size_bed_sheet_dimensions_australialzms0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_602f2241bbd62.pdfIn PDF document text
    • http://topsale.pro/xomubupudideji5gxjk.pdfIn PDF document text
    • http://wekeb.space/84553904358bttld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426556/normal_603f1df7a6113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_150568cc2a364d8ba7586d8a34f50c57.pdf?index=trueIn PDF document text
    • http://muzafevabuma.rf.gd/dikozejeg.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_4f277d30ba5a4eeaaa9cbebfd731068c.pdf?index=trueIn PDF document text
    • http://karuriletepet.epizy.com/95512546967.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://scripts.sil.org/OFLIn 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_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 5344 bytes
SHA-256: e1cf56944168fbc1629330253cb5b7ba8d517ebf4abfa2bdb2b0b4315c376165
font_01_sfnt_off0000fec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC0 10748 bytes
SHA-256: 6e005bdbb451ff82af5661faeaee31af82a1c06951a7d57d367a2cf6aa45c061
font_02_sfnt_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 16204 bytes
SHA-256: 73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502
font_03_sfnt_off000138a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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