Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7fdc57a099fe22…

MALICIOUS

PDF

75.0 KB Created: 2021-03-09 02:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45198d7e28e48f47581f8a15e22241cc SHA-1: aca04ebc12f24d63e4e607d680830068346ad240 SHA-256: fb7fdc57a099fe223e3486e72057c5d946d00cddb0b8e1608eef9878c35958f6
156 Risk Score

Malware Insights

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

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 0.9991

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://crophysi.ru/wix?keyword=record+of+agarest+war+zero+guide PDF link annotation
    • http://mefomizus.22web.org/poulan_chainsaw_p3416_price.pdfIn PDF document text
    • https://cdn.sqhk.co/dufubimaru/bxiigkI/feudal_system_in_the_middle_ages.pdfIn PDF document text
    • https://delosixopefo.weebly.com/uploads/1/3/4/3/134344482/01cb02f.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/bhiigLs/55180743372.pdfIn PDF document text
    • http://axecheat5.xyz/joining_report_lettery2gjh.pdfIn PDF document text
    • http://salonop.xyz/44405319566jufit.pdfIn PDF document text
    • http://wekawuro.22web.org/how_much_does_it_cost_to_be_a_real_estate_agent_in_indiana.pdfIn PDF document text
    • https://jikovezogid.weebly.com/uploads/1/3/1/4/131407088/9836320.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/0ibpRRE/fuwosilomar.pdfIn PDF document text
    • https://pasuwuzo.weebly.com/uploads/1/3/1/4/131438486/vozekavivaso.pdfIn PDF document text
    • http://whalesqpa.fun/rooks_dermatology_downloadav4ac.pdfIn PDF document text
    • http://indir-kazan.com/pumunivipevv9yc5.pdfIn PDF document text
    • https://xetamoro.weebly.com/uploads/1/3/2/8/132815737/vixefimufos-fefowi-lakuralan-ridifu.pdfIn PDF document text
    • http://miravozexafoxiw.iblogger.org/android_11_version_name.pdfIn PDF document text
    • https://nijodumedogale.weebly.com/uploads/1/3/6/0/136082157/misuviler.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/xufaxoferugod/which_rowenta_steamer_is_best.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/risudiwoditifafurafez.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/1920854644.pdfIn PDF document text
    • http://mizozibobekujul.rf.gd/93423271293.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/dugip.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/dozimofezipiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/b._d._o_post_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/paduloluvixitadadumedug.pdfIn PDF document text
    • http://kudawugijamino.rf.gd/box_office_report_2017_bollywood.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_off0000e95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95D 5304 bytes
SHA-256: 999a4fa56f1bcbe26fcd54124f1ddd075b08f26b87cef4659f19b1c070b2bed8
font_01_sfnt_off0000fb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 10148 bytes
SHA-256: d5f422ae3daef23fce3c698cb93535de484dc9924c6e03527fcc1ae31c3967ce

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