Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48f68a30ac39837…

MALICIOUS

PDF

73.7 KB Created: 2021-01-26 23:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 318377ef44c9a1a7220ab7500fdc247c SHA-1: d5604497981414ffaf809a8f9a42f95b28554cd6 SHA-256: e48f68a30ac398376450e76790bbafc867a35d6e730a00b50bc0174ffb52db10
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm designed to redirect users to potentially harmful sites. The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting an attempt to obscure the final malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/123?utm_term=integer+word+problems+worksheet+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fffb092e3d81.pdfIn PDF document text
    • http://tegor.xyz/adjektivdeklination_bungqtf1b.pdfIn PDF document text
    • https://dukuvelawabuze.weebly.com/uploads/1/3/0/9/130969723/709927.pdfIn PDF document text
    • http://verifiedbadges-form.com/asteroids_coming_close_to_earth_20206gxxf.pdfIn PDF document text
    • http://fly-drive.online/82316186564oqp2a.pdfIn PDF document text
    • http://servempieza.site/nunagazametilodupisexxmck.pdfIn PDF document text
    • https://varepakizadi.weebly.com/uploads/1/3/2/7/132740548/wumili.pdfIn PDF document text
    • http://ig-copyrightviolation.com/triple_diamond_slots_downloadq09ge.pdfIn PDF document text
    • https://pirulavedup.weebly.com/uploads/1/3/1/3/131379447/piregeso.pdfIn PDF document text
    • https://welabelodaset.weebly.com/uploads/1/3/5/3/135399274/7980568.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/fNdjbhg/venta_latigos_de_cuero.pdfIn PDF document text
    • http://compte-cmbretagne.best/12108123130kahdr.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/hibiga2/rollercoaster_mania_cheat.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/5gkYwgs/t_mobile_ceo_contact_number_availability.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/dhjhjV8/13090595398.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/mHVgfCl/video_player_download_for_windows_xp.pdfIn PDF document text
    • https://cdn.sqhk.co/motuwezelu/egbMJVa/73569904034.pdfIn PDF document text
    • http://7lessons.space/7065278838o2g7m.pdfIn PDF document text
    • http://hayatevesigar.online/90240418575vqalq.pdfIn PDF document text
    • http://tixshopclub.fun/61120693639q8j5u.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://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_off0000d3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F3 5216 bytes
SHA-256: d6ee964fea0b73c87efa247b83294df059ae021d81b5bc234ba08630f61a5e0b
font_01_sfnt_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 11028 bytes
SHA-256: 81fa7e4277b4c18ae26b2385865849c0a6cb958c1b21c75a228c7fde6874e040
font_02_sfnt_off00010aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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