Malicious PDF — malware analysis report

Static analysis result for SHA-256 2076c5074f61da5b…

MALICIOUS

PDF

89.9 KB Created: 2021-03-02 18:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d64a80c96cd0b4cfc825415b7e8cc2b2 SHA-1: b0a1d63c2160f1a3e256c6906d5f54c3d64d0e97 SHA-256: 2076c5074f61da5b7df4c31596729504f7f1e286b1c1d14c97f03a11c56dd75a
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The document body text, though truncated and obfuscated, includes a search query related to music, which is likely a lure to disguise the malicious intent of redirecting users to potentially harmful websites.

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.
  • 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://druttle.ru/strik?utm_term=old+school+rap+songs+with+good+bass PDF link annotation
    • https://cdn.sqhk.co/mozoposowi/hLiiUGN/9365084570.pdfIn PDF document text
    • https://satuvimafinob.weebly.com/uploads/1/3/0/7/130739393/6340ab9af8f.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/eEdjgjj/mr_ricochet_game.pdfIn PDF document text
    • https://zitozujenuzudip.weebly.com/uploads/1/3/4/0/134042901/69580ef54e7f.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/hfDCaZL/fox_news_live_stream_free_debate_tonight.pdfIn PDF document text
    • https://cdn.sqhk.co/fejumoraw/dhigdih/pesulil.pdfIn PDF document text
    • https://cdn.sqhk.co/pefatipi/MyhchfF/joxufaxojatapegogivaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/zxggheD/balezi.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/gEXsehh/turning_off_roaming_on_samsung_s5.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/jihhgia/mesogosam.pdfIn PDF document text
    • http://fepotarugagi.22web.org/acronis_backup_12._5_advanced_user_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/hhjhWQd/tipuvoxanakegegeruxew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bejopobu.epizy.com/aku_dan_dirimu_cover.pdfIn PDF document text
    • http://miripiwamaza.epizy.com/zig_ziglar_ebook_free_download.pdfIn PDF document text
    • http://ditonumu.epizy.com/20510831693.pdfIn PDF document text
    • http://bopunuzas.rf.gd/how_much_should_it_cost_to_install_a_gas_water_heater.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_off0001216e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216E 5592 bytes
SHA-256: b55bf1bf160024f363e2811f51bda4c532dfb3d87c2c2e3f118b80e58d67adfd
font_01_sfnt_off00013473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13473 11416 bytes
SHA-256: 2d20039005667f9741c25fa7348672a82fd9c4f9b7884c6627a6e3e2340da73b

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