Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ccdf9d2d338782…

MALICIOUS

PDF

86.2 KB Created: 2021-02-23 01:25:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f12a2ffdd1b6d242634e2942d6b40372 SHA-1: a0e4ba03b0b46de5c614d85ce0e6c9c210e2fab4 SHA-256: 95ccdf9d2d33878249f8cb4699cd8475c90c3a0c1d92d68ad787fc1f3209f196
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body text, though garbled, includes a search query for a product, suggesting a lure to trick users into clicking malicious links.

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://bologen.ru/strik?utm_term=samsung+galaxy+s9+price+in+pakistan+today PDF link annotation
    • http://viza.expert/galunenifaboxebiropul2thr0.pdfIn PDF document text
    • http://lemufarora.22web.org/39324302769.pdfIn PDF document text
    • http://moitender.org/61469271887vu4c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407664/normal_6003ed05e9659.pdfIn PDF document text
    • http://wobixoka.66ghz.com/blended_unconformity_definition_geology.pdfIn PDF document text
    • http://podeves.xyz/62120462390e3ct3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477400/normal_601fd31f0cc04.pdfIn PDF document text
    • http://dorightschool.com/205322565829ljlg.pdfIn PDF document text
    • http://instapriz.online/38469840881ou41o.pdfIn PDF document text
    • http://cesaregaspari.com/vezimomikutotuocnb.pdfIn PDF document text
    • http://decideyouself.fun/which_of_the_following_is_not_a_valid_strategy_for_determining_a_transfer_pricevo82i.pdfIn PDF document text
    • https://bemozepe.weebly.com/uploads/1/3/0/7/130739793/nodagatomupexagilo.pdfIn PDF document text
    • http://frukt.fun/wijusoluresetowisafukopul2a0vq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojobawezelo.rf.gd/polycythaemia_vera_guidelines.pdfIn PDF document text
    • http://wativexapu.epizy.com/divegifanineluwubotejup.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_off000110ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EE 5884 bytes
SHA-256: fc8461137479b142b7779970eb4abc8772740cc75770579b9d6e73f2ead6274d
font_01_sfnt_off000124eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EB 11348 bytes
SHA-256: b217de2f41f252e80384201e5a05a0d0f74b7408a5a5f7cbdd4c5c4d099d27c7

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