Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c28dc367e967b08…

MALICIOUS

PDF

74.3 KB Created: 2021-02-13 13:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f0a70791013f774bd1b0ad84c4ba05bf SHA-1: 0df98e1ea2756604c495d9e77bed2debd700d774 SHA-256: 0c28dc367e967b08a545f72e4514a1f775451d32deae8d60f3b21957ef7b335a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://jottigo.ru/123?utm_term=inequalities+word+problems+worksheet+7th+grade PDF link annotation
    • https://cdn.sqhk.co/kerutadit/hasmohi/police_scanner_5-_0_pro_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/jjgiDih/red_ball_adventure_4_volume_5.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/glxmwgN/rapuposudixopejapojamul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_601ee69fe4d6a.pdfIn PDF document text
    • http://gsmall.space/nekamizakuva87op.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/qijijxj/9896720736.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/Fii0jbl/beat_racer_mod_android_1.pdfIn PDF document text
    • http://mmmmmme.space/nisumegcgzba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449411/normal_600f64b49948e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500432/normal_5fdff43fc6635.pdfIn PDF document text
    • http://rusherx.studio/after_stream_vffgga4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373770/normal_5fed51616e9a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_6020049106e79.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
    • https://s3.amazonaws.com/rogugagatuf/55084218507.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/tulogojid.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/batenoxufanosovida.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/difozuni.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/80440951978.pdfIn PDF document text
    • http://suboxasolu.rf.gd/apoorva_kannada_full_movie_free.pdfIn PDF document text
    • http://wuparol.epizy.com/regarara.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

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_off0000d4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B1 5692 bytes
SHA-256: 33334d941878bc3ab11e52ec9645d6c8caa80c96c3979298099675fb8cb21f13
font_01_sfnt_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 10964 bytes
SHA-256: e3b4349e48b272c10b8774bfaae337796377e8344128b0595798adeda5de5fa4
font_02_sfnt_off00010d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D37 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.