Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a53260eadb9c90c…

MALICIOUS

PDF

78.7 KB Created: 2021-04-02 22:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ddc67fb6d7039ce1c552df61d7d42ae9 SHA-1: 5a6edf81f1f547945b3808c2d27b01ba3189019b SHA-256: 3a53260eadb9c90ce055290de6c872baa72b95c0712cb0bd194566850d96a6ef
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of XFA forms and embedded URIs points towards potential exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 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.
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://golowaki.ru/123?utm_term=plastic+dust+sheets+near+me PDF link annotation
    • http://xakojudanek.66ghz.com/dodedosolale.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/Gghjchd/redungeon_apk_mod_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/mibazudifij/aEQ5eex/bilubaledoxoxon.pdfIn PDF document text
    • https://cdn.sqhk.co/zepigelona/E1Igihg/free_printable_easy_crossword_puzzles_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/fCghXNR/39381631373.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/gfwhQge/bolagujidotobuxaramovo.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/gjjga01/sneakers_wallpaper_4k_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/fegozanodedu/6heDFhg/manualidades_navideas_en_fieltro_con_moldes.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/2KTPieW/basic_ballet_positions_with_arms.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxozamikoge/jb3vVgc/lusimafunagopepeguf.pdfIn PDF document text
    • http://pressit.space/video_format_factory_onlineuv68o.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/833890858280vc66.pdfIn PDF document text
    • http://biolinkus.me/wavasumotibimogipupozukip6f3zv.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/dgjjajd/kz_offset_flashlight_mount.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/fUb4nDd/survival_prison_escape_v3_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/je8jbhh/40937549908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ruxofepugoloma.rf.gd/barfi_movie_all_song.pdfIn PDF document text
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_b68aa530bb194a10bfe18716fffdbf3a.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_c3ba136a38c44786bcbcb5da0a565df9.pdf?index=trueIn PDF document text
    • http://nabepazefesuju.epizy.com/zewozojoxixaga.pdfIn PDF document text
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_f086641f5afc40219311da45d667310f.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_6a385af755a04f67bfa836d1899830f9.pdf?index=trueIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_2d580d08e8404f19a4b77d1638541dd6.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 4952 bytes
SHA-256: b3b3965b379bf8cd4bd7e57ca6cdd9ad2f5fb7356890ed5463c9638b1ab8ae56
font_01_sfnt_off0000faa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 10820 bytes
SHA-256: aa52f7f1e4c89902b192fb94cd779b67e55c7420a56456e3bd210601eda3c962
font_02_sfnt_off00011f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F63 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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