Malicious PDF — malware analysis report

Static analysis result for SHA-256 0310fac4eaae4519…

MALICIOUS

PDF

72.7 KB Created: 2021-03-12 02:13:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a1b5b799a4b88e48ba03990c534e1435 SHA-1: 31ec4fedfc8e4d3cf1d3220ea84b06dca3f44791 SHA-256: 0310fac4eaae451984d2c52b4b0fe4ce850a6cf5c5b03f1cd1ce0a56a923c259
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/wix?keyword=roblox+model+maker PDF link annotation
    • https://gatiwisukebemo.weebly.com/uploads/1/3/1/4/131438587/getasanifomeb.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/cH2Prhb/microgolfoven_combi_inbouw.pdfIn PDF document text
    • https://giwizakewat.weebly.com/uploads/1/3/1/8/131857916/sanane.pdfIn PDF document text
    • https://fipufiradak.weebly.com/uploads/1/3/0/8/130813779/8b52b63f3f30f.pdfIn PDF document text
    • https://cdn.sqhk.co/fapebenu/Zijihib/71135134307.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/anatomy_for_fantasy_artists_free_download.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/what_to_look_for_when_buying_a_new_car_battery.pdfIn PDF document text
    • https://cdn.sqhk.co/pegatorapo/6zwJ2Fk/warhammer_quest_2_end_times_review.pdfIn PDF document text
    • http://golixudib.mypressonline.com/77023619661.pdfIn PDF document text
    • https://subarijarasojud.weebly.com/uploads/1/3/4/3/134332778/xuvaximoxuwu_vuwozulil_vuxalufunerufe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bajekixizosi.myartsonline.com/21907395521.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_b5d6ca620e4f49deb538560d05c071a7.pdf?index=trueIn PDF document text
    • http://jisijuvod.myartsonline.com/fobopumetuvezirisu.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_263376c74e5d4f4399b04b2955d4af93.pdf?index=trueIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_79ffe8fb48954a8b9816a756a65959a8.pdf?index=trueIn PDF document text
    • http://torejejowomu.myartsonline.com/aditya_hridayam_sanskrit.pdfIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_c1b149186cf144fd8568fc4575894fa9.pdf?index=trueIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_09e12235a8054a7f906ecf835452d650.pdf?index=trueIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_238a3472af204d349230dc55e082fa2d.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_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 5072 bytes
SHA-256: ba6c05df2a9eb505564fa7c016648febb2fbd4439ed9a9e03c1adbfa254c1775
font_01_sfnt_off0000f0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 10840 bytes
SHA-256: 94efd7192a53ce7c2fa688e94b5afa148fe26821b1c2cde04585f7b9f2c576cf

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