Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e0e0409d75fb1f…

MALICIOUS

PDF

68.7 KB Created: 2021-04-03 14:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 592bec0bda74e8656186feac369ccc14 SHA-1: e2c54e4dac1319af2947cdf901afe823e0add24d SHA-256: 90e0e0409d75fb1f289699cc1c67e7359dbd2da2a07f9049c37b46dfd9619529
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://resalured.ru/123?utm_term=bernardo+stamateas+pdf+gratis PDF link annotation
    • https://vawuzusafut.weebly.com/uploads/1/3/4/8/134863851/8474762.pdfIn PDF document text
    • https://wimekigulaz.weebly.com/uploads/1/3/1/1/131163744/lemulukujafa.pdfIn PDF document text
    • https://pafufido.weebly.com/uploads/1/3/1/4/131407890/kejekono.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/jjcjejb/87862519137.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/gijagji/472207916.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/ggBhidt/elite_space_trading_game_android.pdfIn PDF document text
    • https://zutizogemene.weebly.com/uploads/1/3/5/3/135348028/loluxapoxarivuwi.pdfIn PDF document text
    • https://domenadonasi.weebly.com/uploads/1/3/0/8/130874365/butekuxapobor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tudawufed/tuwepomanujejezuz.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/kannada_love_feeling_songs_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/045576d3-c532-43e2-a12f-8f7ec10ceeb9/63251465754.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/android_studio_stable_version_3._0.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/faweded.pdfIn PDF document text
    • http://lutidufewujasa.epizy.com/61112443163.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/48763345444.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/97248138137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805de52f-7256-49fc-8794-603c7dd70721/bodega_dreams_sapo_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/zenevaraxipununivedovuw.pdfIn PDF document text
    • http://potufepevumu.rf.gd/bpsc_mains_question_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/microbiology_a_human_perspective_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944757eb-6af9-4f36-96e5-cb53df3adddb/27576371310.pdfIn PDF document text
    • http://sigogijukajuli.rf.gd/bekimujibotupasaj.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/bowaziwuparugerolajameki.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/pudulasew.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_off0000cd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5E 5380 bytes
SHA-256: 14fe7bba8acf96ecc4f662d264c6f3309d2d803821c6df60764bc7ba7580876a
font_01_sfnt_off0000df95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF95 12264 bytes
SHA-256: 51d919e34207d1aeb21b626a6629e68ac16d0c777c071f82b95d28b5f40128bc

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