Malicious PDF — malware analysis report

Static analysis result for SHA-256 f305ba21d259a90b…

MALICIOUS

PDF

82.0 KB Created: 2021-03-16 10:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5cabace4ef0b01fb9193affc239740d0 SHA-1: c61223712dea0e32ec9d77f968402d9269f597ec SHA-256: f305ba21d259a90b73ac27006f0902cd435e5bf9bf3e5f37d682f98ded97bde3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are likely part of a link farm designed to distribute malware or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=schumacher+speed+charge+manual+sc-1200a PDF link annotation
    • https://lekikibobasiva.weebly.com/uploads/1/3/5/3/135350768/eec60e162a27.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/eTchiMK/69330496865.pdfIn PDF document text
    • http://getcreditcheck.info/pezuferivaba4rng.pdfIn PDF document text
    • https://cdn.sqhk.co/vapitinab/jjgdUgh/lost_in_space_hollywood_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/geji9zO/gagitipokezaradutog.pdfIn PDF document text
    • https://pekonupag.weebly.com/uploads/1/3/2/7/132741447/7221693.pdfIn PDF document text
    • https://rokaxitifefisol.weebly.com/uploads/1/3/4/0/134040577/a9f26996a5a88d4.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/xogapisivevili.pdfIn PDF document text
    • http://rubisteq.online/insignia_24_inch_tv_with_dvd_playercnrhn.pdfIn PDF document text
    • https://dotomogef.weebly.com/uploads/1/3/4/7/134760479/2bc370d00.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwutiro/gibYijc/swing_lowe_sweet_chariote_movie_cast.pdfIn PDF document text
    • http://freehookup.xyz/tekugezifejy34k1.pdfIn PDF document text
    • https://xufefizomuziz.weebly.com/uploads/1/3/5/3/135346589/cbe211480d511.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/4jcXihA/art_therapy_prompts_for_grief.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/f096ea02c708728.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/sepovutapakogaf/malayalam_movie_vimanam_songs_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/airline_manager_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/2570416028.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/fuzonebizepe.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/filmywap_movies_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/dawiwupumaralaza.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/objectives_of_social_work.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_off0000fe01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE01 5948 bytes
SHA-256: 01d90438e3a682d51f18c6b48733d8f8696c0daf44fa90b673b03effafca9ac6
font_01_sfnt_off0001121d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121D 11308 bytes
SHA-256: b40934c65291c004961894cc076bbc4d5586703ef4a2926c842c8e26e16fe4f7

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