Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d4146a25151ebd…

MALICIOUS

PDF

73.2 KB Created: 2021-01-18 10:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 927a52c247f3394f94427de867953e63 SHA-1: 3b3cada681ae7c5828daec4c01c25c5b497cca95 SHA-256: a0d4146a25151ebd693c16f90ce2ed88b62b3224ed8ab5997e2d072bfadfe6ef
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=claviculas+de+salomon+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f8b3a752f2b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5fad8a71b2495.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/gdFRYcU/zididuxutitusax.pdfIn PDF document text
    • http://rirelavemug.iblogger.org/sukilezomuwojorixexe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483337/normal_5fecfe7e41731.pdfIn PDF document text
    • https://kutubugovu.weebly.com/uploads/1/3/4/5/134581815/459011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479460/normal_5fbf2784bc57e.pdfIn PDF document text
    • https://site-1178703.mozfiles.com/files/1178703/us_national_parks_map.pdfIn PDF document text
    • https://site-1178690.mozfiles.com/files/1178690/mevibulomaxuvizofetitin.pdfIn PDF document text
    • https://cdn.sqhk.co/sewetotab/behjhws/tejetaxatefogazolamuvalo.pdfIn PDF document text
    • https://rekeboko.weebly.com/uploads/1/3/4/8/134899800/xemud.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/YjfIMhy/mapalurefifuliwuzarare.pdfIn PDF document text
    • https://site-1235873.mozfiles.com/files/1235873/basic_synonyms_pre-_intermediate.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/natubanewa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xivubijorudi.epizy.com/zudiwaremujizirat.pdfIn PDF document text
    • http://marobow.epizy.com/betusile_mcinga_song_vuso_wakho.pdfIn PDF document text
    • http://magikid.epizy.com/bricks_breaker_shot_apk_mod.pdfIn PDF document text
    • http://kenuzuwemonuda.epizy.com/lagev.pdfIn PDF document text
    • http://dexifuv.epizy.com/74124049545.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_off0000dd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 5172 bytes
SHA-256: 9955be1658768eb674c3ab53768803b4f0d317144a542e9266c0513c97bf556d
font_01_sfnt_off0000eee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE8 12020 bytes
SHA-256: 68973f7195c4d95094b6f7d244ee63a9276d8505f85963715207defc29646384

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