Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d35a0642b8c625…

MALICIOUS

PDF

59.9 KB Created: 2020-11-24 03:37:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 890c699eda37d93ebed358b54915b00a SHA-1: ddc52314f472aa287f5abddb6717cf9b23636e0c SHA-256: 59d35a0642b8c625036d8e9c38b1d56b85e813edd2de5c92e2fdae8703441d07
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 0.9996

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 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://trafftec.ru/strik?utm_term=desguace+os+ventolines PDF link annotation
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/pawinekiduxik_bedige_xiziz.pdfIn PDF document text
    • https://towosafanux.weebly.com/uploads/1/3/4/7/134704793/7204053.pdfIn PDF document text
    • https://pupaxutakigi.weebly.com/uploads/1/3/4/5/134579126/dasejoveso-javagenujudana-ganugipi-totokaripimifi.pdfIn PDF document text
    • https://nabofirolem.weebly.com/uploads/1/3/4/6/134632364/kegixekokefenefubi.pdfIn PDF document text
    • https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/jemusufufetag-wenowonisobu-lujetexole.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/1ab47d4752a4bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5fbc13422da7e.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/lanubili/how_to_make_form_center_in_html.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/easy_peel_labels_avery_template_5160.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/yohoho.io_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/arena_games_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/chicago_electric_tile_saw.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/40243069027.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_off0000b0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E0 4932 bytes
SHA-256: b7549c4e4c81c78ac4010aae475f2152dab34efe0c23ce770175d8e1e6c74227
font_01_sfnt_off0000c1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D0 9344 bytes
SHA-256: b783766594be2d2c601a8a5621985e22935530b8023b68c2035fb65e08837a24

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