Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc6f2400141642a…

MALICIOUS

PDF

77.9 KB Created: 2021-03-03 02:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 558e863af257e7e7fcbfcbde35c8aace SHA-1: f57956f993531a6036cb69a0743fb7c7fdeff2da SHA-256: dbc6f2400141642a36d0a8de4c19e1850802a7662453b86d7e6f4aca1a5b97d6
226 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many pointing to disposable hosting services, indicating a link farm designed to direct users to potentially malicious sites. The presence of an invisible link to 'loginwithfb.site' strongly suggests a phishing attempt. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure or a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://baarspo.ru/award?keyword=hamilton+beach+dual+sandwich+maker+recipes PDF link annotation
    • https://cdn.sqhk.co/dexediwiboze/dfyjghg/papog.pdfIn PDF document text
    • https://roxejozojone.weebly.com/uploads/1/3/0/9/130969259/611607.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/hihidhf/29857673118.pdfIn PDF document text
    • https://xegadoponuxi.weebly.com/uploads/1/3/0/7/130775279/vokakaxejosuwigajus.pdfIn PDF document text
    • https://fejunula.weebly.com/uploads/1/3/4/3/134363834/1e3c9971e710d6.pdfIn PDF document text
    • https://tafugamukizigip.weebly.com/uploads/1/3/0/7/130775106/vukesali-rajumabasugoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479904/normal_601e468e320f4.pdfIn PDF document text
    • http://hookup757.fun/masonry_wall_design_spreadsheet8v6ta.pdfIn PDF document text
    • https://banalixigadevub.weebly.com/uploads/1/3/4/7/134722660/7332119.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/jSRVmje/6993174560.pdfIn PDF document text
    • https://cdn.sqhk.co/zujomawa/TDxhdM2/21626756378.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470019/normal_5fcd8899a8e43.pdfIn PDF document text
    • https://cdn.sqhk.co/wevosevob/NihjcrO/siropipurilaxagoj.pdfIn PDF document text
    • http://loginwithfb.site/mens_haircuts_long_hairhklab.pdfIn PDF document text
    • https://davugewozo.weebly.com/uploads/1/3/1/4/131408984/7482812.pdfIn PDF document text
    • http://superheatbelt.xyz/vpn_for_pc_unblocked762mq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://retejades.rf.gd/10151489052.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_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 5572 bytes
SHA-256: 9ec7c18b4703a82cfb3ce392db9d9e07a76af8b67b5793e651b98c3e2876aabd
font_01_sfnt_off00010517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 10796 bytes
SHA-256: 7c1929f3936fe44a32d71c4b2b70c92c95cf69618977ada410814a862c665839

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