Malicious PDF — malware analysis report

Static analysis result for SHA-256 95508e268eea2be0…

MALICIOUS

PDF

74.6 KB Created: 2021-02-27 07:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 84126b2abb4bd13486ca0fee25d6e81e SHA-1: 15d3318e3a391de748df98aa328531f1e4e4c439 SHA-256: 95508e268eea2be05e2d23acc8b955b7563b4be20e7a6fe59ac8155e1244b857
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and ClamAV, specifically flagging it as a credential phishing attempt impersonating Instagram. The document contains numerous links, including an invisible link to a suspicious domain, designed to redirect users to malicious sites. The presence of multiple external URIs and link farms suggests an effort to obscure the final destination, which is likely a phishing page.

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/a8d0d4094da2c.pdf.
  • 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://dugedepap.ru/aws?utm_term=what+is+the+tone+of+the+cask+of+amontillado PDF link annotation
    • http://rcasino.info/bollywood_movie_songs_mr_jatt2bisk.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/a8d0d4094da2c.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/jcs4Uid/77998236670.pdfIn PDF document text
    • https://makifilibavik.weebly.com/uploads/1/3/5/3/135383918/da7d254b.pdfIn PDF document text
    • http://sethel.xyz/921900579735paep.pdfIn PDF document text
    • https://davugunibelerab.weebly.com/uploads/1/3/4/6/134612729/tepuzofirog.pdfIn PDF document text
    • https://cdn.sqhk.co/tusenepobam/biaNGij/79989385187.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/8133394.pdfIn PDF document text
    • http://kadesevi.iblogger.org/mifum.pdfIn PDF document text
    • http://rte-ita.fun/33951239681z2zhr.pdfIn PDF document text
    • http://catsism.com/35148423172bqk7k.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/gifkhfM/39855107180.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/XjcNTjO/unicorn_horn_photoshop_overlay.pdfIn PDF document text
    • http://managerprogram.live/zigazenekemigitomova40k.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/ajeibhf/xajopemelipet.pdfIn PDF document text
    • http://big-ita.space/the_white_tiger_film_plot_summary6sz0v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 5240 bytes
SHA-256: ed18305edca8c272bb87b5be628fde9313b4523e8af471b570ee27497e1f3e03
font_01_sfnt_off0000f9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A7 10456 bytes
SHA-256: c30a523a689db8c7b480db9f565da79a04625a0418967df6d8746d9701614b15

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