Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffd4d5ce4f00a0e…

MALICIOUS

PDF

78.0 KB Created: 2021-03-05 20:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d1ff3b7a18a26ab2a9b94e6751ebfcb7 SHA-1: a7d62656afa6c3ba02ab34f8480a4db341c0b34d SHA-256: 2ffd4d5ce4f00a0e92215eaea26c95105e1fc42a8a90979a9b39decbb7cf6d52
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are suspicious and likely lead to malicious content or phishing sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier further support the malicious nature of this PDF, likely used as a lure to redirect users to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=how+to+make+a+bean+bag+toss+with+cardboard PDF link annotation
    • https://nepubodi.weebly.com/uploads/1/3/4/6/134610278/vejareteku.pdfIn PDF document text
    • http://mybatut.store/hardwood_amino_for_nba_2k207i287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5fd683233bcba.pdfIn PDF document text
    • http://sodahq.club/angel_of_mine_monicabx0qf.pdfIn PDF document text
    • http://babbieshop.ru/us_marine_corps_training_schedulekxyw0.pdfIn PDF document text
    • https://kufesivewafe.weebly.com/uploads/1/3/1/3/131384244/kapazoninufan.pdfIn PDF document text
    • https://ligetivegivug.weebly.com/uploads/1/3/4/0/134041815/9484270.pdfIn PDF document text
    • http://grandov.pro/i_movie_in_telugu_video_songsnom85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_5fd3d697dd358.pdfIn PDF document text
    • http://latencfsrt.space/auxiliary_verbs_worksheets_for_gradey8ruu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_803a930dc8b148bf9b06af61e335b754.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/xubabamuzovebelelojozo.pdfIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_785065b5bc0e40baa45109a0f071ce06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/bose_soundlink_micro_bluetooth_manual.pdfIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_523c51a4a7d149dd8d66683ef2c71c0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/53370368382.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/accounts_receivable_net_of_allowance_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/19657289547.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_b0111bb4f73f4868a170e895ec4bbeac.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_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 5576 bytes
SHA-256: 2ed983dfccc59ebb27b667236fb3c8126ef26d31f25464cdbec5d3d00431b7fe
font_01_sfnt_off00010509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10509 10996 bytes
SHA-256: 89091c469e79a234795dcc96f9db3ccf5b950594a6ead24f8c8d5bc08103a6f8

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