Malicious PDF — malware analysis report

Static analysis result for SHA-256 385f3da59b12e63c…

MALICIOUS

PDF

87.6 KB Created: 2021-04-20 02:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e2204c4b763943b77324f12fda37a587 SHA-1: 229c117a1c57187a247e94552a0f6e1ac0a87906 SHA-256: 385f3da59b12e63c675231a0d2fee1a9108499db3f4ad97b3ff4fb05c8adc208
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to Weebly and sqhk.co domains, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/strik?utm_term=flight+of+the+bumblebee PDF link annotation
    • https://fezulenigi.weebly.com/uploads/1/3/4/4/134485980/22c5e7e28.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/icX26jc/digimexiwu.pdfIn PDF document text
    • https://tavutafaj.weebly.com/uploads/1/3/1/4/131482866/8640990.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/NFKhcha/19393922057.pdfIn PDF document text
    • https://natapoja.weebly.com/uploads/1/3/0/8/130813782/9b93744580.pdfIn PDF document text
    • https://cdn.sqhk.co/linigurep/nWfghXL/sevetutu.pdfIn PDF document text
    • https://cdn.sqhk.co/lemisobe/WicjfRj/all_creatures_great_and_small_film_1975_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/nudogada/wxhhicT/lekimemotemoru.pdfIn PDF document text
    • https://rosowimibezot.weebly.com/uploads/1/3/5/3/135392622/3754732.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxobenona/ifH74rC/red_alert_restart_logo.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/WMjhckS/pinballz_austin_birthday.pdfIn PDF document text
    • https://fiwinibikevuli.weebly.com/uploads/1/3/5/3/135339450/732999839aae9df.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/ijqjege/2011_audi_q5_workshop_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/id7gfdd/pubg_mobile_lite_zombie_mode_apkpure.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/bulikowexunepov/bidosenus.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/toshiba_satellite_l750_i7_price.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/pioneer_sph-da120_not_turning_on.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/86327902850.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/89524018834.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/wayne_w_dyer_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/dreams_akira_kurosawa_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/33555981764.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_off0001188d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188D 4792 bytes
SHA-256: 53bdce594177bd462c708007dec75e0b6b4c3c5d2b02bccc89db68d2f9802115
font_01_sfnt_off000128c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C3 11764 bytes
SHA-256: 7dfe1c07034e4bb05015d8c98a0e2fa824857ea6205e25dc5ea4426beeb141f1

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