Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b24f48e18b9102b…

MALICIOUS

PDF

80.5 KB Created: 2021-04-01 05:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6117ef8810ad16159b6ef250e3daef6e SHA-1: e1f756ce7cb8705c0fc9d97bee263c062e328542 SHA-256: 7b24f48e18b9102bc84a73cad17891c678947fa7b53ac07268a4d333c90e8d74
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one pointing to 'xajibur.ru', which are likely used to redirect users to malicious download sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a link farm designed for malicious distribution.

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://xajibur.ru/123?utm_term=my+talking+tom+2+apkpure PDF link annotation
    • https://cdn.sqhk.co/takivelalam/cbifqUC/bigo_live_stream_apk_free_download.pdfIn PDF document text
    • http://cardioactiveitalia.site/88695483253g1pvn.pdfIn PDF document text
    • https://wirimodarezekas.weebly.com/uploads/1/3/5/3/135314182/lalolenaverega.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/16514609031.pdfIn PDF document text
    • http://disconto50.info/rasexuvevapudusivovuxabuum10c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445754/normal_5ff5cb0468f1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_60645b71e9328.pdfIn PDF document text
    • https://bewebisiseten.weebly.com/uploads/1/3/0/8/130874130/fixefaza_foragune_zedesixaxasoges_tevibo.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/ob8l4ij/fopazizozowubalamixa.pdfIn PDF document text
    • http://extraterrestrials.space/devisatotomm11l5.pdfIn PDF document text
    • http://gezakiribonenin.mywebcommunity.org/aprendizaje_socializado.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/bavakutovo-pujisurawufuxog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kipejefanowisu.atwebpages.com/b._pharm_syllabus_download.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/gta_cheat_codes_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/67325253286.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/vomiravorunexasezotapat.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 5264 bytes
SHA-256: b479e3eb9a9931fdeb48a50a37aaafa96e2d9ea8df73f037814cc6a1915cea9d
font_01_sfnt_off0000f537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF537 13060 bytes
SHA-256: ab6b0f611efab2926e454cfc7d7336141b2fd0b9837b7c2c686d7f7489ee04b4
font_02_sfnt_off00011f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8E 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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