Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be3305b71730a1d…

MALICIOUS

PDF

76.7 KB Created: 2021-02-18 22:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3aab1ac59653876daa75cf78fcec997c SHA-1: d54696eb42380aebcea3fc7ae0f758bd1b02b884 SHA-256: 0be3305b71730a1d0ff35ef345f18b599a8d87bad108ef187721ac4d3302126c
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized URLs designed to mimic search results, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. One such link, 'https://bologen.ru/strik?utm_term=where+is+spark+plug+on+husqvarna+lawn+tractor', is presented as a direct result. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=where+is+spark+plug+on+husqvarna+lawn+tractor PDF link annotation
    • https://cdn.sqhk.co/wifukatar/jf38rbF/the_crossing_dead_app.pdfIn PDF document text
    • https://maxijegiv.weebly.com/uploads/1/3/4/1/134131269/09d886477af9.pdfIn PDF document text
    • https://fepanaxowa.weebly.com/uploads/1/3/4/3/134311119/2939795.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/fuzowugejem.pdfIn PDF document text
    • https://bojepelesu.weebly.com/uploads/1/3/5/3/135350442/bokuwalafixugos_sajipemumef.pdfIn PDF document text
    • https://cdn.sqhk.co/gevagedubop/fidWjgj/subway_team_valley.pdfIn PDF document text
    • https://cdn.sqhk.co/jagakutojut/4y3gfid/tangent_line_graph_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/virapazetif/jhjjTOP/std_10_maths_chapter_2_circles.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/marimejerebo/94238676946.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/folk_songs_free_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/invoice_audit_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/27659263242.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/balfour_beatty_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/channa_ve_divya_drishti_full_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/800126158.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/ableton_live_sampler.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/tuwiwajuwi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 5552 bytes
SHA-256: cd5e3ecde9404bdab6fc083e21a3f99306e0a0bbd75a0832a22e78f5bf37bf3d
font_01_sfnt_off0001010a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010A 10784 bytes
SHA-256: 66e1f4a6a9d97ce14ee07fbfcb5f2ed5d6d789a47a28cb9dead0265a8922c2fb

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