Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a926289a6075224…

MALICIOUS

PDF

71.2 KB Created: 2021-02-04 03:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9fe4d5cbbbabac0f87e5668b157415a0 SHA-1: 249d7faafa704986efcf6f98b497736b997ca58a SHA-256: 6a926289a6075224ae762f0e3550cf9dd71e9901b3cca5d8f130cd9c630fc6ee
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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=solutions+practice+test+answers PDF link annotation
    • https://cdn.sqhk.co/lasetipulos/ie8e3aZ/call_of_duty_warzone_map_update.pdfIn PDF document text
    • https://fadesirowawilej.weebly.com/uploads/1/3/1/6/131606674/nufovonemefovelar.pdfIn PDF document text
    • http://accface.in/ps4_pro_serial_number5ylvx.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/ja748jc/coda_di_volpe_reservations.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/hy60jea/54147080322.pdfIn PDF document text
    • http://luminar4-download.xyz/dr_davey_dentist_owen_sound155li.pdfIn PDF document text
    • http://kudretbozaci.com/pilot_royale_hackd7jij.pdfIn PDF document text
    • https://cdn.sqhk.co/bitanalagep/hfUjgyc/waterfowl_hunting_dog_names.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_5fe6b379270dc.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/jjrp9gf/vufosurigag.pdfIn PDF document text
    • http://slmit.fun/national_teacher_appreciation_day_2021kn0yk.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/iI0ghhj/logidogajonamide.pdfIn PDF document text
    • http://slmit.fun/zuveganojuvqhvm3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407576/normal_5fca76c389c48.pdfIn PDF document text
    • http://jotijitod.66ghz.com/betrayal_of_the_promise_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kupemamenigasi.rf.gd/statement_addressing_key_selection_criteria_template.pdfIn PDF document text
    • http://finesegugumemo.epizy.com/19019955777.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_off0000d035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD035 5120 bytes
SHA-256: e7c25dd49cc3d80b8c2c40f24c1807d70dcfa131904e6759201ff4dca4871f9d
font_01_sfnt_off0000e1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BC 14456 bytes
SHA-256: b206470b2b6e4484a6a8abfded57249660dcfb2456901810211df13e0b4a2261

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