Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdeafd8de79f7d7…

MALICIOUS

PDF

109.7 KB Created: 2021-03-12 14:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8ac6f41461f6a6bc40a55546371ecb47 SHA-1: 5f21a97c3546c0c6e5827d1b6c8ae5219b446fbb SHA-256: dbdeafd8de79f7d7582c49143d770d3ef67838d96e588def8882ca13242ea3ad
156 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 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://ponafet.ru/strik?utm_term=does+bb%2526t+charge+for+wire+transfers PDF link annotation
    • http://pelistens.xyz/admin_nco_board_questionszwy7o.pdfIn PDF document text
    • http://prizinsta24.online/basc_3_scoring_guide17f4r.pdfIn PDF document text
    • http://vk-settings-change.online/86881289849ba170.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/dogusazosikilasoragikofeuhsn8.pdfIn PDF document text
    • http://healthyforczechrepublic.site/scarlett_mysteries_cursed_child_trophy_guide3qgv4.pdfIn PDF document text
    • http://abzac.me/xilufefaxufine5lbmw.pdfIn PDF document text
    • http://bluebadge-support.com/boku_dake_ga_inai_machi_mangaisvsi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_3419e6a9050d41358dc9b5d12693a9d5.pdf?index=trueIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_866db069b06f40c189f01ffda919de29.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/73870959436.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/bet365_poker_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/cooking_academy_1_apk.pdfIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_d4eecf3df1c7473fb309317157858235.pdf?index=trueIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_bafb2cd71cba4255b26c1864e943d47c.pdf?index=trueIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_b2627b10daca43848ab7519c7e801648.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/dream_girl_full_movie_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/japanese_auction_sheet_verification.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/twilight_movie_breaking_dawn_part_2_watch_online_free.pdfIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_4880ae3ebbc4432f98c098c36125a3e4.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_off0001740b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1740B 4480 bytes
SHA-256: cf7f176a429aecff3304da9a071ea77a990dfbde9b9ddca9e4f1000e7321c257
font_01_sfnt_off0001835e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1835E 11480 bytes
SHA-256: 7992f084b77b469ea28042c12cffc8d951a38e73027188db23509ce71da28307

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