Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e964ca38160af1f…

MALICIOUS

PDF

72.4 KB Created: 2021-01-27 13:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bda6c8a29b970cda316c3d450fa43671 SHA-1: 9aee5d1088243976ca73cadc43b91b9920ae7bf4 SHA-256: 8e964ca38160af1fb6b40730122a2ce55b633fd1dc107f7b25da0f39932724c2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains text related to 'Frog lake oregon weather' and 'wkhtmltopdf', suggesting a lure to a malicious website disguised as a search result. The presence of numerous external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect the user to potentially harmful content.

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://maypoin.ru/123?utm_term=frog+lake+oregon+weather PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/b57eIhg/40990819812.pdfIn PDF document text
    • http://prazdnikprosto.ru/22683707871w9uw9.pdfIn PDF document text
    • http://arm-watch1.club/vutijetimasafowozozifi1cauc.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/GSIggco/24560170676.pdfIn PDF document text
    • http://clobuss.ru/gewutasakurifajejofumanqrudv.pdfIn PDF document text
    • http://bet-info.ru/stock_market_simulation_games_online_freenp0bj.pdfIn PDF document text
    • http://tumbochka.space/fesodabozatugutawababe3gbhg.pdfIn PDF document text
    • http://fortuneocredit.com/super_bomberman_r_online_co_op8oyme.pdfIn PDF document text
    • http://momentikshop.space/70442171989hlwgw.pdfIn PDF document text
    • http://ingmijn.com/sevabozekasiwelemmjzsm.pdfIn PDF document text
    • http://ruwaxidalemib.iblogger.org/application_android_l_g.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/oSaMheC/11_pinball_arcade_fantasy_games_are_there.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://donenufalu.rf.gd/24320317593.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED2 4880 bytes
SHA-256: 4723e0ea297de8f899ed71ea100464d27e0e1b3fa219a9b76720939ad9303d5c
font_01_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 11288 bytes
SHA-256: a528b7af20cc6c6083d3b04c341c35921b845c1dace99c09569aacdb17759921

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