Malicious PDF — malware analysis report

Static analysis result for SHA-256 1505ccca511c5697…

MALICIOUS

PDF

72.8 KB Created: 2021-02-10 08:18:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 039d7b78c856bcfcde52365305c0fc9f SHA-1: bce6a5a5b6822b1740e7f8e435cb3efc84e869d3 SHA-256: 1505ccca511c56972cb090c492ef5f406b189ee3c73d086f22d1f9d91547a565
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and references a "Husky weight distribution hitch installation manual" to disguise its malicious intent. The presence of a large number of external links, including a link farm heuristic firing, strongly suggests the document is designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/aws?utm_term=husky+weight+distribution+hitch+installation+manual PDF link annotation
    • https://gidutuzewefira.weebly.com/uploads/1/3/1/3/131380066/kefese-vutinoxi-sipakakaxuxoluz-wediri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482418/normal_6015cbfa4c916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427498/normal_5fd656911d722.pdfIn PDF document text
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/e745ad25a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381287/normal_5fe10d82df5d6.pdfIn PDF document text
    • http://virilibag.66ghz.com/androidx_cardview_dependency.pdfIn PDF document text
    • http://vofovadero.22web.org/what_is_mch_on_a_hematology_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_600e3873a2c36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://diwovofuzeloxu.epizy.com/auto_rotate_android_pie.pdfIn PDF document text
    • http://zoloxufiz.epizy.com/rowinaweg.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/openshot_video_editor_for_windows_7.pdfIn PDF document text
    • http://roxinus.rf.gd/osrs_falador_medium_diary_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/android_button_animation_github.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/numerologia_cabalistica_ultima_fronteira.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/ek_chumma_song_2019.pdfIn PDF document text
    • http://posugez.epizy.com/joomla_forum_website_template.pdfIn PDF document text
    • http://gujavez.rf.gd/96163290223.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0ED 5596 bytes
SHA-256: 89a2f4068ee51d655e4ab1a64c4b0bcea7add9d6abf24001964ec7c5aee0fe5b
font_01_sfnt_off0000e3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 10332 bytes
SHA-256: beda44a432409e58bcf28d832961faefcbc61f1e4718a8c036fddb52e13e5614
font_02_sfnt_off00010728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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