Malicious PDF — malware analysis report

Static analysis result for SHA-256 235c4c68811a6124…

MALICIOUS

PDF

71.3 KB Created: 2021-02-19 06:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8942d63b732dd890ac375bf797db6688 SHA-1: 042a986a4feb2d3c3f190f4e2bbb41e8b9748ecf SHA-256: 235c4c68811a612497b5ce673e3753b40a2972964727dc7af4e24ff8b62eb118
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL suggesting a lure related to installing printer drivers. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing or redirection attacks.

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 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://leonvi.ru/123?utm_term=how+to+install+canon+printer+scanner+on+windows+10 PDF link annotation
    • http://rodigevofu.iblogger.org/wotitesozodurijuz.pdfIn PDF document text
    • http://doropunakas.iblogger.org/80870269441.pdfIn PDF document text
    • http://kersita.space/alcatel_pixi_4_firmware_freetfpcv.pdfIn PDF document text
    • http://viza.expert/25819176571coros.pdfIn PDF document text
    • http://dektesheff.xyz/55330679644ww61r.pdfIn PDF document text
    • http://zipimenegan.iblogger.org/subomudi.pdfIn PDF document text
    • http://genoray.pro/1379499475tpfv6.pdfIn PDF document text
    • http://axecheat5.xyz/uncertainties_meaning_in_tagalogo2kj8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezewesiwakoruw.rf.gd/bollywood_sad_song_mr_jatt.pdfIn PDF document text
    • http://zubeleboju.epizy.com/lajagibakatugupivaxi.pdfIn PDF document text
    • http://pudedenos.epizy.com/odia_new_dj_song_2019.pdfIn PDF document text
    • http://zasexizo.rf.gd/torchlight_2_synergies_mod_guide.pdfIn PDF document text
    • http://zoferuwarutor.epizy.com/hospital_front_desk_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/auto_clicker_automatic_tap_apk_2019.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_off0000d992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD992 5316 bytes
SHA-256: a10e6940e1f8cef1b447af0fdac7444de83d4353bc0b8745e4e03415e82e0c8b
font_01_sfnt_off0000ebc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC5 10716 bytes
SHA-256: c81b748879420ced6710620d18f2b6876b0b3272f3ba95f0a94c624ea442ed8e

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