Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd12ff93fb38615…

MALICIOUS

PDF

90.7 KB Created: 2021-03-30 17:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f59f1db39ebbe5cd3f0594477c479804 SHA-1: abe72dd5201d52bf02b784ec6890d2706299d42c SHA-256: 8cd12ff93fb38615e1b9ecca3ccd6027ca682db00ae270dd19ea45b46bcac1a7
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external websites. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malicious content. The presence of a URL like 'https://dafemum.ru/wix?keyword=swtor+eternity+vault+guide' suggests a phishing or scam attempt, aiming to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=swtor+eternity+vault+guide
    • http://regvoolkim.website/compare_and_contrast_essay_structure_examplem59xm.pdf
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/sogonugedoxer_kotixediw.pdf
    • https://lemamoramu.weebly.com/uploads/1/3/5/3/135348447/jejigije.pdf
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/7597868.pdf
    • http://lnstagramverifiedsbadgeform.com/lei_de_murphy_filme_interestelar1i8ae.pdf
    • http://stroymarketmetal.ru/vafuruga107qs.pdf
    • http://onsideball.info/bupelakizivowusaxowesama2ezke.pdf
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/1139718.pdf
    • https://misirukizos.weebly.com/uploads/1/3/4/0/134017349/9938353.pdf
    • http://cancandance.org/maternity_leave_south_africa_2019_forms33e90.pdf
    • http://dulfy.net/2012/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/15daae5f-4b93-4841-93cb-1e8d13bdf7ae/genius_g750_charger_lights.pdf
    • https://uploads.strikinglycdn.com/files/b9ff3de4-c3d4-444a-986c-8540ef3d6711/vupasiwuditin.pdf
    • https://s3.amazonaws.com/lixisariwulo/what_does_a_social_reproduction_theory_seek_to_explain.pdf
    • https://uploads.strikinglycdn.com/files/c6eace73-8a4c-41b2-96ce-71f8f140a7c9/xugujoz.pdf
    • https://uploads.strikinglycdn.com/files/bb79ff5f-4b62-455d-8711-445aef545539/lijitiz.pdf
    • https://s3.amazonaws.com/padadutiseni/83951833057.pdf
    • https://s3.amazonaws.com/kefodek/20693886023.pdf
    • https://s3.amazonaws.com/xijilesuzuxo/kacey_musgraves_butterflies_sheet_music.pdf
    • https://s3.amazonaws.com/metakibeme/zejifarozulugi.pdf
    • https://s3.amazonaws.com/babetafaperaxov/ruvusifadopodetiniwaxiwef.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d1.bin
a2efcf25c03a6cc1373aa57735a78409d20941675c893171bc58e2f52c8c5d72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103D1 5052 bytes
font_01_sfnt_off0001151a.bin
c9fbe1cf805afeb55fa12adea5660c68dc532569cecdb34fd8682010339511ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1151A 10700 bytes
font_02_sfnt_off000139ce.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139CE 16204 bytes
font_03_sfnt_off00014efb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFB 4324 bytes

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