Malicious PDF — malware analysis report

Static analysis result for SHA-256 129c1d6d3015076b…

MALICIOUS

PDF

77.0 KB Created: 2021-01-24 02:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6c33a5b59e18de8ad08035ae10476ec SHA-1: d32c239bb6057fac0be3c626ce42a73c5739f6dc SHA-256: 129c1d6d3015076b2062d388ab0411baa7c1f8c62ced407e5b6f9073ba022b2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are obfuscated or use link farms, indicating a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier strongly suggest this is a phishing or scam document designed to lure victims. No scripts were extracted, but the presence of numerous external URIs is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/aws?utm_term=fha+loan+guidelines+florida
    • https://cdn.sqhk.co/sezunofubuzi/jjq6heD/real_chess_3d_how_to_castle.pdf
    • https://cdn.sqhk.co/tinolefowi/cendhic/macmillan_education_students_books_for_class_4.pdf
    • https://cdn.sqhk.co/nuvexajamu/hfidrif/ferojefapirunomevatot.pdf
    • https://cdn.sqhk.co/bivosozos/ohfRzmy/justin_timberlake_friends_with_benefits_full_movie.pdf
    • https://cdn.sqhk.co/noxomosanena/jhhjfSq/d2_head_basketball_coach_salary.pdf
    • https://cdn.sqhk.co/fusajovogi/lCHjajX/93771818757.pdf
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/wijal_numatepop_vozuzuxovomotuj_wisasuga.pdf
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/pexepar.pdf
    • https://cdn.sqhk.co/bawevabob/cBRNXhf/gawidasune.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wexoteluwag/dolulabasusidusuraxirebi.pdf
    • https://s3.amazonaws.com/salosibejodod/xodamerizobojuwewelexuji.pdf
    • https://s3.amazonaws.com/lokijuronig/how_to_automate_excel_sheet_work.pdf
    • https://s3.amazonaws.com/kufazete/c_printf_format_codes.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/sepebelug.pdf
    • https://s3.amazonaws.com/bevarolimesale/bryan_adams_mp4_songs_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1fb.bin
3fc09034c6610504b454e0f0004435da40ef683b47580ccd96a80459033231d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 4928 bytes
font_01_sfnt_off0000f2aa.bin
ec73aa2ab1f6cad1f9cf080468f0355c26ba132464509a989e3e1fa3d2ebe4f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 11152 bytes
font_02_sfnt_off0001188c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1188C 4324 bytes

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