Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07416b352ee2c4d…

MALICIOUS

PDF

76.7 KB Created: 2021-03-20 03:36:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ef6fefae03bc375bb9649619d96c6e4b SHA-1: 56be80b6d149185e3164c71dd0ec964f02666549 SHA-256: d07416b352ee2c4d0e4a20b075b0e3db8e25ece9719a5e3502a5fbc6ce97fdbb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=stihl+ts400+carb+settings PDF link annotation
    • http://iciko.xyz/15652107303yqopg.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/54250389885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_60293587b7aa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367308/normal_60089ad3efb3f.pdfIn PDF document text
    • http://all-gopro.com/bakukanizurumakew54pw7.pdfIn PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/f0aacfdb2cba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_60526a5b49c76.pdfIn PDF document text
    • https://wegidakalulat.weebly.com/uploads/1/3/5/3/135337254/8096296.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402948/normal_5fcdb5b232dfc.pdfIn PDF document text
    • http://idealica-ordina.site/bruno_munari_il_cerchiod72g2.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/nivegogibamelimaxo.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/1066239.pdfIn PDF document text
    • https://tinuwese.weebly.com/uploads/1/3/5/3/135300683/6841657.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fef43a850984.pdfIn PDF document text
    • https://rejezulibege.weebly.com/uploads/1/3/4/0/134018585/sidibizaguk-rijezifapikekif-fojivel.pdfIn PDF document text
    • http://rmk4sale.xyz/gunship_battle_helicopter_mod_apk_latestwb60a.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/the_sims_3_ambitions_cd_key.pdfIn PDF document text
    • http://tesocoin.online/kiguxalavi1omv.pdfIn PDF document text
    • http://rawiduti.medianewsonline.com/sulegesuxenino.pdfIn PDF document text
    • https://lizunega.weebly.com/uploads/1/3/5/3/135395432/tixep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taberadajip.atwebpages.com/9689677664.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/lisajuwiw.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/psycho_robert_bloch_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/motulorilisup.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/lspdfr_coastal_callouts.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 5536 bytes
SHA-256: 71fba052665d0ec240739d39b82a7493eb4a35ffa0d7bc0f2d8502ca75dc7267
font_01_sfnt_off0000fd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD82 11312 bytes
SHA-256: 3d35c58fbaece544a9771d4576d15517776a177f78f0e2a5d4211fdd5a4058d9

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