Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb77ec8d8b550b2…

MALICIOUS

PDF

66.8 KB Created: 2021-02-21 03:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 06f70c88f4e697ca91425c0067b1e930 SHA-1: 3c993bee9a9561b896ffccdac99d5d6124e53423 SHA-256: fcb77ec8d8b550b205e638a6600de52e8604b9b6c1715d31bd8bd308ae324f28
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a link farm on disposable hosting, reinforcing the malicious nature. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=how+to+connect+canon+mx922+to+ipad PDF link annotation
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/4cfb39ac46b7f.pdfIn PDF document text
    • http://xilagima.66ghz.com/zunedi.pdfIn PDF document text
    • http://fanuvowebutil.22web.org/whatsapp_for_nokia_e71_jar.pdfIn PDF document text
    • https://cdn.sqhk.co/fakosopalo/dWigVsW/2_players_car_games_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bafuberudod/egehAaW/sesifotoniwatowe.pdfIn PDF document text
    • http://maroron.22web.org/68339275653.pdfIn PDF document text
    • https://waramexebogod.weebly.com/uploads/1/3/1/8/131856917/vikusuxakaneju.pdfIn PDF document text
    • https://patijunig.weebly.com/uploads/1/3/0/9/130969449/dafibafo.pdfIn PDF document text
    • https://bakasilamor.weebly.com/uploads/1/3/1/4/131407315/168842.pdfIn PDF document text
    • https://noserosajegupa.weebly.com/uploads/1/3/1/4/131453720/1ada613b2.pdfIn PDF document text
    • https://taduravepe.weebly.com/uploads/1/3/4/7/134714340/1422577.pdfIn PDF document text
    • http://kolejuf.iblogger.org/risk_management_plan_template_south_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/Usjijao/tazogived.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/ibeggih/download_game_the_dark_pursuer_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/tewinutilarufezinujapixem.pdfIn PDF document text
    • http://wuguwusilabibax.epizy.com/73934945881.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/46655000548.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/ratixetogilufitulafoxize.pdfIn PDF document text
    • http://borinalujid.epizy.com/internal_newsletter_templates_for_outlook.pdfIn PDF document text
    • http://jeragapa.epizy.com/85005015513.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC858 5320 bytes
SHA-256: b7a6b0e903775d2aa442e8e2b40451e47928c1f7c16b02d17930644984eaeb7f
font_01_sfnt_off0000da7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7C 10444 bytes
SHA-256: df062a720f903eeae0dce6dcb6f28dbff244bd9923ec575d29d844cebaefe902

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