Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbf1ce5a892b0c2…

MALICIOUS

PDF

79.4 KB Created: 2021-03-18 11:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 54603fba353d52c78c9be53c80bb82b5 SHA-1: d8aaf06292d61e8034a11aacbb98ae1cace29f46 SHA-256: 0dbf1ce5a892b0c26b018d012ff7461a045792b8e83f38343ac028e820a19e6a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://golowaki.ru/wix?keyword=tides+for+fishing+neah+bay PDF link annotation
    • https://cdn.sqhk.co/pumafuki/Z4qifBU/rewemaguxawus.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/e5iahdl/slime_simulator_app.pdfIn PDF document text
    • http://weareanonymous.org/lazimumabomiw86ung.pdfIn PDF document text
    • https://tawigijonepoter.weebly.com/uploads/1/3/4/0/134012415/fafakinesikan.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/benimagiror-sopolem-jedozi.pdfIn PDF document text
    • https://zabodoxukuxubar.weebly.com/uploads/1/3/4/9/134904472/4195042.pdfIn PDF document text
    • http://vorecan.fun/688975392474cjrm.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejagefep/ajhhhhg/kigepopamodo.pdfIn PDF document text
    • https://vukajikabazaxeg.weebly.com/uploads/1/3/4/7/134711597/d893576ad3d03.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/d3eac.pdfIn PDF document text
    • http://jakartapro.xyz/lesson_before_dying_analysis82vae.pdfIn PDF document text
    • https://cdn.sqhk.co/velujuvaxal/5pjffBz/2020_formula_40_pc.pdfIn PDF document text
    • https://dulebepil.weebly.com/uploads/1/3/3/9/133999512/diwenejuver.pdfIn PDF document text
    • https://cdn.sqhk.co/nilofixogezu/je6o7ia/bajofebelewoli.pdfIn PDF document text
    • https://tunupufimudodo.weebly.com/uploads/1/3/4/3/134324073/da8b5a5f6480.pdfIn PDF document text
    • http://normal-id.com/515127784311swlz.pdfIn PDF document text
    • http://hookup157.online/behaviorism_and_social_learning_theory_views_development_asxkrsl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vikukinumet/facebook_selfie_frame_template_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/5692464629.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/how_to_turn_on_lights_on_razer_keyboard.pdfIn PDF document text
    • https://ad060920-74d0-4a59-a46a-f478898ed72a.filesusr.com/ugd/a7c1e6_733806f4a250451dadac619dafab281f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/ambition_singapore_salary_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/calisthenic_movement_video.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_4ed57792f4b74ebdbdea3a132d044e96.pdf?index=trueIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_9dbfeb3df20945a7bf3ab9be205adaf3.pdf?index=trueIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_5496b2064118442b926d59accb53fb28.pdf?index=trueIn PDF document text
    • https://c3bb11cb-ba02-405d-8462-2b4421b436e1.filesusr.com/ugd/4c7814_e2a9b97a50c3450d8c6483f0eba9bbdd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 5036 bytes
SHA-256: 0f241b7c23d48ea321cf08783c00ea5eee4697968b0c6b924b2b6426ee0c08b2
font_01_sfnt_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 10004 bytes
SHA-256: 8760b0fcdc7e0de448a43018d1e325a1ca8ae50035852b9792fb3664d6397b56
font_02_sfnt_off000121e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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