Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e4ee71c696860e…

MALICIOUS

PDF

77.3 KB Created: 2021-04-08 00:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 43a0ab5a541feb979d7658a0eefb9702 SHA-1: 8e9da105b43b5e2ba417039d1654da25ce6eeb02 SHA-256: 27e4ee71c696860e6592cebc498761a7ecf8c5bba3851ad2dcf1b2db205f11af
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 0.9960

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 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://dugedepap.ru/wix?keyword=physics+unit+2+study+guide PDF link annotation
    • http://tiktokhd.design/the_new_male_sexualityyo06r.pdfIn PDF document text
    • http://fukikenikiru.22web.org/bracket_looking_at_you_audio.pdfIn PDF document text
    • http://boothattendant.com/jitapufegewajojugidair0.pdfIn PDF document text
    • http://tehnopolis.org/80623437951qxr1p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446925/normal_600299bee4c08.pdfIn PDF document text
    • http://uptodate.site/ap_transport_app9fnwr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5fc6029fd017f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488581/normal_5ff7da0aca1a4.pdfIn PDF document text
    • http://pitushok.fun/xapilopirobxrjz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f079f6e-8b4d-4b30-b4da-b6e901fb88ad/21214158289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f31b4b0-9bab-4640-ab1f-16998d3ab3ca/fafarogaki.pdfIn PDF document text
    • http://dusuvoparujizoj.rf.gd/kantianism_and_utilitarianism.pdfIn PDF document text
    • http://tobekiginekafo.epizy.com/kalefirujobuxarad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb594d6-74ad-4221-857f-ddd5f58502b7/45942876944.pdfIn PDF document text
    • http://famifel.rf.gd/all_brandy_melville_locations_in_california.pdfIn PDF document text
    • http://wazilopuwifelig.epizy.com/54062139667.pdfIn PDF document text
    • http://jikasetanixibef.epizy.com/ame_dicionrio_de_administrao_de_medicamentos_na_enfermagem.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/witchery_guide_ftb.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/63733536846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30cc828f-e53b-4dc0-a7d4-020f5a4d3c87/the_long_winter_trilogy_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/great_cv_templates_word.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/what_chapter_is_firmament_in_the_bible.pdfIn PDF document text
    • http://kixurazo.rf.gd/zidapirez.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/london_bus_tracker_app_android.pdfIn PDF document text
    • http://gekavitominugi.epizy.com/bible_old_testament_bangla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/619657aa-0a53-4225-9df2-29b89f240e58/how_to_cut_monster_illuminessence_led_strip.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_off0000f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 5096 bytes
SHA-256: 9a245d20ebca9b5c1014982b90819c84cbd707803d2e9a97cea923a36695ec97
font_01_sfnt_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 11432 bytes
SHA-256: 0eef80b98e612bac35c13cb0add2e930a841bf86deae240c395cf367cae24ba0

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