Malicious PDF — malware analysis report

Static analysis result for SHA-256 0271a966c2d8aa7c…

MALICIOUS

PDF

80.3 KB Created: 2021-03-15 06:26:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 377bb6134407032aad3fd73411967e98 SHA-1: 3d9b7e29df23cf032806765003d1b642eab9a06d SHA-256: 0271a966c2d8aa7cb30f97b93216ca400ec8de7cc639fda17a640f3298cc839d
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 0.9990

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://druttle.ru/wix?keyword=illusia+1+apk PDF link annotation
    • https://cdn.sqhk.co/gefimiwotux/2Zjbqjj/76641096675.pdfIn PDF document text
    • http://3gusevshop.space/audition_la_la_land_piano_sheetlyar1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5fe19f68b99f7.pdfIn PDF document text
    • https://gisevivejomu.weebly.com/uploads/1/3/5/3/135393920/tupajumefawel.pdfIn PDF document text
    • https://rixutabenenik.weebly.com/uploads/1/3/4/4/134498467/kenupowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485153/normal_5fceb00612454.pdfIn PDF document text
    • https://tureduritisamo.weebly.com/uploads/1/3/4/6/134676104/3982987.pdfIn PDF document text
    • https://cdn.sqhk.co/riraxizilob/ihqPCRK/kovifotavaj.pdfIn PDF document text
    • https://wizugelavuri.weebly.com/uploads/1/3/5/3/135325487/d0dcdaaed7270a1.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/iaIifjb/50559077170.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/yahchdO/likimebijuresepasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467601/normal_5ff032dea50a1.pdfIn PDF document text
    • http://5gusevshop.space/busojelabuwexagiguvulbo4ms.pdfIn PDF document text
    • http://vsedlyatebya.xyz/467018489003dmt6.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/ijg6ejr/72489043970.pdfIn PDF document text
    • https://rapinawenag.weebly.com/uploads/1/3/0/9/130969945/sakeposadoj-pekazanojaf-fifaseve-jojipelozevav.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/b8d84672-d922-4116-86c7-d79194e16129/is_magnesium_hydroxide_ionic_or_molecular.pdfIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_702cc3df6a53487f83c7b22f75742a7b.pdf?index=trueIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_d0f9ffc4a0414984889746d83ea12c6e.pdf?index=trueIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_a3aebde378e14732aa855b13653b4d9b.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_08fcc526dce7486887bac5db827c0306.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b660601-1970-428d-96b6-2ac32a99dfe7/wekizofodidawubajivarele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89fae4be-cc6e-474e-8144-aa5e27b08638/matrixyl_3000_serum_side_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77898f5a-bbd3-4acd-9960-0a1ec9d75de5/60433853301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30f02e8-2771-4ab0-bb9f-886df2f74055/wolidefagusevunumuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 3016 bytes
SHA-256: 437f5c574089599331cadcb6662fc3e289bc3130a96750da26d08c17d15e30df
font_01_sfnt_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 4772 bytes
SHA-256: b3baa08a0ad4daef216fddfbdad5d1ad94f7a7bc1b2e41874cdf2e2abc67ad82
font_02_sfnt_off00010b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B50 12200 bytes
SHA-256: fd1531e7be84d33aaece95ea93a9f4f1b9c94f49347dd4610a79c757dd702f8e