Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f0153b0d201df9…

MALICIOUS

PDF

69.7 KB Created: 2021-01-09 00:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5b760631fa931a2d8074e1bceb2c65b5 SHA-1: ac9eb49eeb356d3583174d1848320667aa09262c SHA-256: 96f0153b0d201df9d4beb914f4a74ebc79dbea2b6ab35dd5c52fc285e781c138
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The primary external URL observed is 'https://trafffi.ru/wb?keyword=pinball%20space%20cadet%20android', which likely serves as a gateway to further malicious content or phishing pages. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/wb?keyword=pinball%20space%20cadet%20android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476288/normal_5ff156c2728d3.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/FjhjchL/9018684446.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/5OZrAQ1/head_soccer_world_cup_2014_weebly.pdfIn PDF document text
    • https://jeretidaker.weebly.com/uploads/1/3/4/5/134595905/4720665.pdfIn PDF document text
    • https://wetololat.weebly.com/uploads/1/3/4/7/134710700/wofake.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_5fc79a6be0cfd.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/vofinarivi_xojedizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_5fda79e2aca5e.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/hifioWw/crazy_store_cell_phone_accessories.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/fejaxi_fezuzoxukofizub_tatipetonusik.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/VVwGXgU/cinemark_colombia_armenia.pdfIn PDF document text
    • https://cdn.sqhk.co/wemupaxuziv/J6jjOge/petelobajivakade.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/436367dc-86b9-45aa-b749-00515c6baad0/poser_multiplication_avec_virgule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481be9af-eb0f-460e-a208-92ebd89c5fc0/bulubotilinilamumu.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/brownsea_island_swim_2018_entry_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/android_version_names_a_to_z.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_off0000d38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38A 5208 bytes
SHA-256: 7978283a7e4cbce53dba7b2191b8eec179ce0ed0a2aad9251a577c982c3fadf0
font_01_sfnt_off0000e53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53F 10772 bytes
SHA-256: ff661f342720008300ca2cb6f5d26896209c735e574783e5d414115231758555

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