Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda3c4f939979aed…

MALICIOUS

PDF

75.1 KB Created: 2021-02-19 23:32:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 20d49105dbbae04febc167791e65c8b7 SHA-1: 56c2bb1b26fc3e6608dc80bdcc512a791a3b549b SHA-256: eda3c4f939979aedab342959706bf370420cbe3dc1b4816c3bc3720663e29919
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 0.9998

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://bologen.ru/wix?keyword=backstage+pass+pdf+download PDF link annotation
    • https://vosuzupitozom.weebly.com/uploads/1/3/5/3/135313705/ritawavatol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_600a1c7dab3ff.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/r0jf6Mz/entry_level_social_media_marketing_jobs_los_angeles.pdfIn PDF document text
    • https://fivoputan.weebly.com/uploads/1/3/1/4/131408393/4473891.pdfIn PDF document text
    • http://paxivevazuf.iblogger.org/fizazimiposex.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/aAii7kp/ballz_shooter_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/YvhgBgf/19051719609.pdfIn PDF document text
    • http://depalowivejal.iblogger.org/ketidigabofavajakowam.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/mabigoge_jesuz_nigojozikeludad_mupazediluti.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikalamo/thijaie/cooking_master_boy_episode_1_cantonese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sarowagilujet.rf.gd/pakodoliboperesotali.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/ico_incident_reporting_guidance.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/111090554.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/anurag_kulkarni_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/percy_jackson_the_lightning_thief_book_plot.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/77913910645.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_off0000e7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F1 5432 bytes
SHA-256: d4669d08f9a1a674008eefd9d59006e2085bffb5fb3b7d978eeac873e2539f40
font_01_sfnt_off0000fa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 10728 bytes
SHA-256: a42494756c260c73cfc101b14e19c9540f2d4ba0affabc946806590b11ae7692

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