Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb44e39a71557b4…

MALICIOUS

PDF

76.1 KB Created: 2021-03-08 03:37:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e89880d801c167e0278deb2543492305 SHA-1: 469342fd8e832512106e5a95e7499fb1b6dc0dd1 SHA-256: ccb44e39a71557b412e4eb0ca05a8e8c2d741da045c56c5f5fce96f677a584e9
156 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, along with a ClamAV detection for Pdf.Phishing.Trojan. The embedded URLs, such as 'https://xezojetit.ru/wix?keyword=legendary+game+of+heroes+dust+guide', suggest a phishing or malware distribution attempt disguised as a game guide. No scripts were extracted, but the presence of numerous external links points to a link farm or redirection scheme.

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 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.
  • 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://xezojetit.ru/wix?keyword=legendary+game+of+heroes+dust+guide PDF link annotation
    • http://meetcabinets.xyz/3289554830640wja.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/augcVy7/accubow_2020_app.pdfIn PDF document text
    • https://zikagedatudupoz.weebly.com/uploads/1/3/4/2/134266226/mufilogepenata.pdfIn PDF document text
    • http://hayatevesigar.online/12911702374a0ykj.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/InejcA7/dewivobotinasopafozi.pdfIn PDF document text
    • http://talkme-news.info/48379879362aaqom.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/8790563.pdfIn PDF document text
    • http://zoneeuro.pro/how_to_fix_refrigerator_light_bulb33c2w.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/aUko5zg/nasa_federal_credit_union_cd_rates.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/damapakabivezipos444fv.pdfIn PDF document text
    • https://pazonijozofax.weebly.com/uploads/1/3/1/6/131606668/3620460.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/ii1BNfz/principles_of_management_notes_for_bba.pdfIn PDF document text
    • http://ryursew.space/447282890279pkfk.pdfIn PDF document text
    • http://familyit.pro/dubunekefasipibevokojod6uo8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/report_drivers_license_lost_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/19800266754.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/plague_inc_full_apk_2019_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/76798299660.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_off0000ec89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC89 5332 bytes
SHA-256: f8e8fe792f079859455472d7984de680e7e0ce027fac3b8d671bf22779be5c92
font_01_sfnt_off0000fe96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 10812 bytes
SHA-256: 7a6b6c323e1841d8442f278e8c82cc5b8011780cec87b6caa34553afda52727c

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