Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cd07c6462b89821…

MALICIOUS

PDF

81.2 KB Created: 2021-03-10 22:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d27f45f55b2cef87cbdbafe852444b13 SHA-1: 90230c2887fa67e84ba456c1a03c09d1cb20a453 SHA-256: 9cd07c6462b898210fbeb9c2e92e09d7d7667d98b0ae7d25366afb676e5e67aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it's part of a link farm designed to drive traffic to other sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs are likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=william+faulkner+books+list PDF link annotation
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/62c49d72.pdfIn PDF document text
    • https://zidimegaga.weebly.com/uploads/1/3/0/9/130969389/tirituripedenu.pdfIn PDF document text
    • http://hookup756.fun/sennheiser_rs_120_11_reviewj3rtf.pdfIn PDF document text
    • https://gewujamagig.weebly.com/uploads/1/3/5/3/135339218/jajopevuserenotini.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/gb0DicK/racing_shooter_revenge_2017_filming_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/waladoved/gjggchc/tevumo.pdfIn PDF document text
    • https://sibafuguwo.weebly.com/uploads/1/3/4/6/134679660/kumamakiru.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/what_religion_is_based_on_science.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/hjdjevZ/daxifujoledezov.pdfIn PDF document text
    • https://nirixebuwema.weebly.com/uploads/1/3/5/9/135990662/8ba6ff83c.pdfIn PDF document text
    • https://figuzejigof.weebly.com/uploads/1/3/4/6/134644002/fimuwegubawi_nivopaji.pdfIn PDF document text
    • http://dhl-order.info/pixel_car_drag_tune3032w.pdfIn PDF document text
    • https://dozemobogojegum.weebly.com/uploads/1/3/4/7/134759036/lufupejefukesulitu.pdfIn PDF document text
    • https://zalajugimawif.weebly.com/uploads/1/3/0/7/130739284/42067.pdfIn PDF document text
    • https://nenesezeli.weebly.com/uploads/1/3/0/7/130775424/6421448.pdfIn PDF document text
    • https://mojikusabuja.weebly.com/uploads/1/3/5/3/135301399/kogofagoropesiwipubu.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/bagokiko/mamapagexasezomajar.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/fakofovogosezazokavu.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/cuisinart_ss-700_parts_diagram.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/75443611402.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/perforated_sheet_pan_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/drunken_boxing_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/13_reasons_why_season_4_release_date_uk.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_off00010164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10164 5132 bytes
SHA-256: 7c28bfd2484284c2f8ac8c6abb32d483ee29833de2a78ec22780f4124797ac9c
font_01_sfnt_off000112d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D4 10672 bytes
SHA-256: 4f96deb919b9adc6cae3201cc179f4f75b2286c8c17e45240406c9c5163e41ce

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