Malicious PDF — malware analysis report

Static analysis result for SHA-256 657f975d502a9d19…

MALICIOUS

PDF

85.1 KB Created: 2021-03-01 13:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fd55a8372b1c61009b5df0337a7e7d6c SHA-1: c407e3cdaed1a7d6977ec096d486b2c6c341798f SHA-256: 657f975d502a9d1965319dc731f7072ccf1f04d4b04c92ef3659bc553d213671
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

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 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://dugedepap.ru/123?utm_term=ft-857d+mic+settings PDF link annotation
    • http://tomandbxof.site/86585500046kk5a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413862/normal_6026ff1557811.pdfIn PDF document text
    • https://wugumelejemumaj.weebly.com/uploads/1/3/5/3/135324079/8547129.pdfIn PDF document text
    • https://tofesozexeraj.weebly.com/uploads/1/3/4/6/134610570/deguzarogeku-sesubeloxujudof.pdfIn PDF document text
    • http://ukranews.icu/kadunuparenavifowe1a0nr.pdfIn PDF document text
    • http://masterpowerpoint.com/smallville_season_1_episode_1_dailymotionbdp3i.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/fafawuzubapowe.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/angles_in_geometric_figures_worksheets_grade_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_6017c7c80c1d1.pdfIn PDF document text
    • http://lnstagramverifycentre.com/betukadivodatuxen0q1jz.pdfIn PDF document text
    • https://babobulelemin.weebly.com/uploads/1/3/5/3/135344535/3298e858e53cc.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/10_steps_to_successful_breastfeeding_ppt.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/4323787042.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383586/normal_5ff6c5b390afa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474220/normal_5fe286f539b66.pdfIn PDF document text
    • https://marikikugawu.weebly.com/uploads/1/3/5/3/135326377/8808014.pdfIn PDF document text
    • https://gajuleli.weebly.com/uploads/1/3/1/8/131871701/c507b4d.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/xidazeze/22679493680.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/88461657307.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 5304 bytes
SHA-256: 728ef70f8c1d66260948030e715c3d36317770598f19aa7ec3638490803a22f4
font_01_sfnt_off0001094d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094D 11508 bytes
SHA-256: 4a74a4c0625914b05711ca34f3248ec9bcab551a3dd5ff3f455c4ce83a558e83
font_02_sfnt_off000130bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BF 16480 bytes
SHA-256: 15a858e7ca58810eedca6b314cbf9fe35668ea3040246c24a6c9bd629062bc34

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