Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3e940d7fc51241…

MALICIOUS

PDF

76.6 KB Created: 2021-04-04 19:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ac73aec94c4c1eb65130aab7ab00e7b6 SHA-1: 5ba005bdb445ff80cb7f0b2cee903f0f3881d795 SHA-256: 6f3e940d7fc51241fdde769623e9f5e05605d52713ba0db000e7d01065dc5e63
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 0.9996

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/123?utm_term=grignard+synthesis+lab+report PDF link annotation
    • https://wigimosasalak.weebly.com/uploads/1/3/2/8/132814057/pugakajupo_mugiwezinotosa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449411/normal_5fe58030242d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444113/normal_60260ebd27fc5.pdfIn PDF document text
    • https://ditaziretuviki.weebly.com/uploads/1/3/0/8/130874055/09cb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_602ad3fcd0897.pdfIn PDF document text
    • http://bigwin-1xbet.fun/how_do_i_start_my_essay_for_collegepj15d.pdfIn PDF document text
    • https://vetepoxep.weebly.com/uploads/1/3/5/3/135302771/0c1902c.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/movobetakiwawuvifeg.pdfIn PDF document text
    • http://medicalpracticementor.com/ccnp_routing_and_switching_tshoot_300-135_official_cert_guide5tpsg.pdfIn PDF document text
    • http://saudiautoinsurance.com/hadees_e_kisa_urdu7xyh4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500446/normal_5ff602038ec62.pdfIn PDF document text
    • http://devgame.design/povuw02g52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wimidisa.epizy.com/dupuraj.pdfIn PDF document text
    • http://jiforexawa.rf.gd/javascript_tutorial_o_reilly.pdfIn PDF document text
    • http://gimusatis.rf.gd/android_accelerometer_sensor_distance.pdfIn PDF document text
    • http://nelevevupa.rf.gd/manufacturing_gemba_walk_template.pdfIn PDF document text
    • http://supewomok.epizy.com/an_introduction_to_language_fromkin_11th_edition.pdfIn PDF document text
    • http://likasiz.epizy.com/subnetting_explained_step_by_step__subnetting_charts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d19290af-e214-467f-8f94-c8849a5127d7/rinapogibedamufarujaxe.pdfIn PDF document text
    • http://puzuzebud.epizy.com/67465497976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0895bcb2-d846-42aa-be24-291df6ae080c/73064176264.pdfIn PDF document text
    • http://garafukaralefa.epizy.com/film_karan_arjun_full_movie.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_off0000edca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCA 5496 bytes
SHA-256: ce5c45ba34dea2b8a770778b01fd05261290113c0829c987ed97084fca02b13f
font_01_sfnt_off00010077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10077 10716 bytes
SHA-256: d4fb2d4120ed3a0a5ff8356641f74ea0836423a24e6fd0eb72c0c72dd50c9fc5

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