Malicious PDF — malware analysis report

Static analysis result for SHA-256 107a26602824e029…

MALICIOUS

PDF

75.7 KB Created: 2021-05-10 07:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04c96d08997244179843a98fe8c30b12 SHA-1: 4ddedc52f83c7b4f0de503af764eb5a890f5c38e SHA-256: 107a26602824e029b363ab470240d14be6dacd13b3cd7907784679bb7bee6f30
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/wb?keyword=gre%20test%20at%20home%20mac PDF link annotation
    • https://retizobokeli.weebly.com/uploads/1/3/1/0/131070240/lipuvefuj.pdfIn PDF document text
    • https://posajegodat.weebly.com/uploads/1/3/4/4/134477503/fopisu.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/AUhdejj/waxigozupup.pdfIn PDF document text
    • http://bezprovodov.guru/lopi_wood_stove_insert_double_dooryi09s.pdfIn PDF document text
    • https://libepofiko.weebly.com/uploads/1/3/1/4/131483361/minawutineloxor_xoluxexatofok_bolufas_tusagif.pdfIn PDF document text
    • https://nenawopoweso.weebly.com/uploads/1/3/1/4/131406478/75638f509a4f3.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/a6LjeI3/love_quotes_in_spanish_with_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/xorazasuno/Mdhd5jd/sniper_gun_war_mod_apk.pdfIn PDF document text
    • http://mists.space/mamba_elite_size4scf0.pdfIn PDF document text
    • http://afracheat8.xyz/22708679341p8tio.pdfIn PDF document text
    • https://fodigedij.weebly.com/uploads/1/3/2/7/132740281/jivuka.pdfIn PDF document text
    • http://aicberg.net/the_natural_book_downloadkn2am.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/68bc3d88-e2dd-412a-a587-599c8ce690b3/16256138901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d787619f-4e28-456c-8576-ebb32d822a7a/witugedita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f72ed62-05e2-421e-9ac8-f741f2796453/subedato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b6d4aec-e3b6-46b1-9f55-7ad6b1fe5cde/82838787605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97930080-aeae-425d-a3d0-9cf56c080c66/levusajoxetomapakadel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14882c0-23f5-4d3a-970b-ac1ef9571a47/55181487174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8938b8-1be0-4e2e-b7c7-e9f192348eaf/befupavikopuxabutiwuwul.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 5040 bytes
SHA-256: 1dfdab306b2fd8a2427ed11105dfd6c830a5b77a956e7abbcb59002112cfc41a
font_01_sfnt_off0000fd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 10712 bytes
SHA-256: a567bc705b7c63ee9f0918b59c1cbb5605f4f85cc66667a20e9daa47630a7472

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