Malicious PDF — malware analysis report

Static analysis result for SHA-256 db324ff5473cc0a4…

MALICIOUS

PDF

75.3 KB Created: 2021-02-24 20:21:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d9c437c741800c8df6c1254401e9d7e3 SHA-1: 1c7107f39e58bfed1b6f7bfdc014e787c5f98b63 SHA-256: db324ff5473cc0a4dd9ffaa6788ffdd7aa340f18425a6e8a4f8bd373185b7cb5
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 0.9997

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://leonvi.ru/123?utm_term=crochet+stitches+patterns+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412599/normal_602859423fc05.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/7765750.pdfIn PDF document text
    • https://kigefewapese.weebly.com/uploads/1/3/4/5/134528385/zazovunerotolo.pdfIn PDF document text
    • http://kraftmann.su/regofomikufagagakeyag6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fc7954c9beb4.pdfIn PDF document text
    • https://cdn.sqhk.co/sojetaji/oJiibjh/zopadegagobax.pdfIn PDF document text
    • http://bestsalestoday.xyz/kotor_2_enter_the_countofu9u.pdfIn PDF document text
    • http://nonly.xyz/jawbone_up24_softwarekf0lj.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/dgecd7r/2131540995.pdfIn PDF document text
    • https://futibiwis.weebly.com/uploads/1/3/1/4/131408183/luwovo.pdfIn PDF document text
    • http://decideyouself.fun/17354519919pm0ry.pdfIn PDF document text
    • https://tuzunogosur.weebly.com/uploads/1/3/0/8/130815213/da1047.pdfIn PDF document text
    • http://delayikapy.xyz/metformina_y_acidosis_lacticae1nqb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_6015bdbccf10a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462096/normal_5feb18e622629.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/xifabilejilab/68867575416.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/spider-_man_2002_video_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/49000361910.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/agneepath_movie_song_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/gokonuwufojuzamatitijujog.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/38051008765.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_off0000e931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 5116 bytes
SHA-256: 50357fe52cdc7fd49e5287e90999a0a92c95a88f176e903de23f51cd03b0c081
font_01_sfnt_off0000fa91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA91 10956 bytes
SHA-256: 6a289f234af99d5eb98d2a4b7144aed2d880007602ffe1faef91bb3386472aa9

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