Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7647c50887b3c2…

MALICIOUS

PDF

92.5 KB Created: 2021-03-16 18:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6012d93236c4b398285b382279a3863b SHA-1: 2ca8628aa08d42b0493d104af6f31358ddfd2ec7 SHA-256: 7d7647c50887b3c23f0476d586af2f937f6a417a6773c742e4545fc88938bcb2
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, indicating a phishing or trojan distribution attempt. The document contains numerous embedded URLs, with a primary focus on 'https://nipisod.ru/wix?keyword=elite+dangerous+exploration+ships+guide' and 'http://fudoviwil.mywebcommunity.org/51841782968.pdf', suggesting these are key destinations for the attack. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/wix?keyword=elite+dangerous+exploration+ships+guide
    • http://fudoviwil.mywebcommunity.org/51841782968.pdf
    • https://cdn.sqhk.co/finelega/dKO5ujh/miniature_golf_in_montrose_colorado.pdf
    • http://gatowixipeba.mywebcommunity.org/d20_call_of_cthulhu.pdf
    • https://cdn.sqhk.co/pobumepova/Gtgdigg/dexobobezazu.pdf
    • http://nakekizedexu.getenjoyment.net/sedip.pdf
    • http://ritixibetono.mygamesonline.org/a1013_transistor.pdf
    • http://rilotelexewobos.iblogger.org/62291623917.pdf
    • https://xagomutub.weebly.com/uploads/1/3/4/3/134321984/f1e640454ff2ca7.pdf
    • https://magalezofutik.weebly.com/uploads/1/3/4/5/134599277/pasikexafu.pdf
    • https://cdn.sqhk.co/wemigiwim/4thjhiF/family_tree_project_template.pdf
    • http://tadidavazutopa.sportsontheweb.net/jiwepuwenizewilu.pdf
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/bonapimas_fexus.pdf
    • https://cdn.sqhk.co/zozijawutuxu/jfNgfii/boat_speedometer_repair_kit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rowagaparik.rf.gd/xuribolurowajesopap.pdf
    • http://wepikupovug.myartsonline.com/ajustador_mecanico.pdf
    • http://gaxezakowe.epizy.com/a_cup_of_tea_idiom_meaning_in_hindi.pdf
    • https://s3.amazonaws.com/gozifep/idli_batter_business_project_report.pdf
    • https://s3.amazonaws.com/jasadavebaga/baxojejax.pdf
    • https://s3.amazonaws.com/vifusupegiza/fox._sports_tv_guide.pdf
    • http://nemebikox.epizy.com/15948578671.pdf
    • http://kejarajavamoge.epizy.com/91835949327.pdf
    • http://niselasot.atwebpages.com/pacate_candide_download.pdf
    • https://s3.amazonaws.com/fenatagazise/17526016865.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_off00011e5c.bin
92bc0d2c1c726d28e863bc6ba31c008e819998cacb97393375cbf58cac232dbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5C 5244 bytes
font_01_sfnt_off0001302a.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1302A 1800 bytes
font_02_sfnt_off000138b7.bin
82d2ef6de5918ade3734eda00abb222b00dffb01aea94c3ee70c59cf0cd6bcd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138B7 12412 bytes

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