Malicious PDF — malware analysis report

Static analysis result for SHA-256 4168445889313405…

MALICIOUS

PDF

84.1 KB Created: 2021-06-10 06:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1a8f0bfc5c4e84bef8281b524b367341 SHA-1: 1fa46f5ea3d47d9abcda550c0eab40cb41b24922 SHA-256: 41684458893134052bf3cc384fafcddaa5a82b27bf6d05446af165eb38a97f80
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

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://chcial.ru/pbw?utm_term=total+fire+bans+ielts+reading+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371248/normal_6033f48c23920.pdfIn PDF document text
    • https://xotukowigadane.weebly.com/uploads/1/3/4/6/134683058/53d757dd7d9f454.pdfIn PDF document text
    • https://wuremude.weebly.com/uploads/1/3/2/8/132815206/soxazubuji-zabolutirokiti-wusumimo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368219/normal_5ff5f1edcf033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_60337c4c485e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411694/normal_5fef9f75903d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377095/normal_60021a5a4fd1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470226/normal_603089b97a5f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_60148ade95186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_605247679394d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_6009d3e8ca7ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453334/normal_5fdbaff50463f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452834/normal_603c5f69ef496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_603abfb5f216c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444630/normal_5ff9b5e482a3c.pdfIn PDF document text
    • https://rijujofa.weebly.com/uploads/1/3/4/3/134323569/c3f80b.pdfIn PDF document text
    • https://vuterezupip.weebly.com/uploads/1/3/1/3/131380942/5482542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411918/normal_5fc611fb5c59d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499651/normal_5fcd966f51e85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e24cd5d-e2c9-45c0-b277-a8f558001fb3/used_john_deere_316_for_sale_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/410b90a7-3aef-416e-ad84-44ee20121d49/70569261690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f124c0c-1fa6-45e1-a394-19e52346ad0f/power_pressure_cooker_xl_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1abc4532-97c6-4686-a93e-c3a1fd698914/gibozuwusivenixezas.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_off00010d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D13 5256 bytes
SHA-256: fae5b16c2ac1036953dca9dc937c471fb1710317a82643aebd2c82550d8ca2db
font_01_sfnt_off00011f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F11 10584 bytes
SHA-256: f66fb543b56f02546d69222f400966a33510791ed648b14c45017bcc5f60d191

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