Malicious PDF — malware analysis report

Static analysis result for SHA-256 7732400ddd431ac9…

MALICIOUS

PDF

79.0 KB Created: 2021-03-30 08:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 39b4dcddf0ddf8ee82a48e304bb84d41 SHA-1: 41f6db7bc93a3957a09702ba5fe56df2a96a3473 SHA-256: 7732400ddd431ac942c43114bd422ad27e7a6e3c11ffdc9ab840a4dc0b9dfe9b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic to drive traffic to potentially malicious sites. The document body, though heavily obfuscated, contains keywords related to 'burrito bison mod apk unlimited recipes', likely used to attract search engine traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/wix?keyword=burrito+bison+mod+apk+unlimited+recipes PDF link annotation
    • https://wilitixovin.weebly.com/uploads/1/3/4/3/134351513/9892793.pdfIn PDF document text
    • https://lomapasaxanigef.weebly.com/uploads/1/3/1/1/131164081/lofefesepawoxi-neneje-pebojowivube.pdfIn PDF document text
    • https://nutolaje.weebly.com/uploads/1/3/4/5/134596366/sunokekalabe_ronoxibo.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/ejgc8IM/best_glass_breaker_and_seatbelt_cutter.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/ChagjoP/zirufemirivuzarusaxax.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/relivipiwaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_605a9e6d9f5fe.pdfIn PDF document text
    • https://betijefozivur.weebly.com/uploads/1/3/0/7/130776077/zotufogiki-likuro-zexukamilanuxu-todusape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_6047204664d19.pdfIn PDF document text
    • https://kekuxepepave.weebly.com/uploads/1/3/0/7/130739312/43a3df4dca229.pdfIn PDF document text
    • https://bujubemido.weebly.com/uploads/1/3/0/7/130776032/melipuge-dadabapod-xabepotofuvidi-berimidelatat.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/nopubejizutirojo.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/dogusa.pdfIn PDF document text
    • https://cdn.sqhk.co/kogewole/agfiijb/zoxokikobanejofefasorekax.pdfIn PDF document text
    • https://cdn.sqhk.co/votawusebak/gdhejd6/gunipewuvezalexujitid.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/vjiPXPm/ice_climber_nes_rom_descargar.pdfIn PDF document text
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/nezabemowuto-sorexopivada.pdfIn PDF document text
    • https://redupasatoli.weebly.com/uploads/1/3/4/4/134446027/b2950.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/9379013.pdfIn PDF document text
    • https://vinaxana.weebly.com/uploads/1/3/4/7/134725794/lamupanezutoziraxew.pdfIn PDF document text
    • https://nakagikirowi.weebly.com/uploads/1/3/2/6/132695306/sarudopekatawez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_8e5ef50f33ea41b6bb8f6d7021b45375.pdf?index=trueIn PDF document text
    • https://b993c520-4fc9-488d-8dda-35d8b3dc2713.filesusr.com/ugd/6f5492_f01807042e3a466e8d3c3f82c89cc32f.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_ce36f09f626f408b9ed7b3edd29fec01.pdf?index=trueIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_a76ebff9dd6c4b29b3911cd49753e074.pdf?index=trueIn 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_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 5472 bytes
SHA-256: af7e50f1dda9a8905c946908637391b527049b9461054a4dc2b8bb8d6bfcb222
font_01_sfnt_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 11216 bytes
SHA-256: 1c9ecda962a1b2865529180f69bdf8e36bc85a91edcebe285e2f471fd230e620

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