Malicious PDF — malware analysis report

Static analysis result for SHA-256 701c279672170149…

MALICIOUS

PDF

72.5 KB Created: 2021-02-02 11:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2cd295c99bdd6ed839f8c01424366a90 SHA-1: b2457087212d2cc1a17995843145704b924be2b4 SHA-256: 701c279672170149c0860015a0b0181ea2fa82207b5fbe09d48db6b20c062bf7
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links pointing to various domains, indicating a link farm or phishing attempt. Heuristics identify these links as malicious redirectors and part of a disposable link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://yafferge.ru/123?utm_term=an+indigenous+peoples%2527+history+of+the+united+states+pdf In PDF document text
    • http://salebox.shop/tafufajevupethlqi.pdfIn PDF document text
    • https://tesurupijirixu.weebly.com/uploads/1/3/0/8/130813669/1218676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448113/normal_5fe7ddfbc0a46.pdfIn PDF document text
    • https://cdn.sqhk.co/mikibitugusu/bihDgfX/entry_level_marketing_analyst_jobs_near_me.pdfIn PDF document text
    • http://alexsaf.ru/lozirosukuxobiw2c6kz.pdfIn PDF document text
    • http://tesocoin.online/paraphrase_exercises_for_ieltsikkc6.pdfIn PDF document text
    • http://afracheat2.xyz/registro_de_observacion_del_desarrollo_y_aprendizaje_de_los_niosgfy1j.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/eifsged/tanks_for_sale_craigslist.pdfIn PDF document text
    • https://cdn.sqhk.co/mivesumor/jf9xlhf/archery_target_winnipeg.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/ghphfhd/cruise_critic_roll_call_grand_princess.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/heicTha/39683021016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zukusuvajijip.epizy.com/applications_of_astable_multivibrator.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_off0000de55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE55 5428 bytes
SHA-256: 13b246fe7cba1c9fb8089b001fceec13784aa61b687f787f16d02d74de7e2440
font_01_sfnt_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 10568 bytes
SHA-256: bc9cde0a9ff51a301f9c602f5551338e608e3f6671db7e1db4d2e1bbad0acd04

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