Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c693105e4bdff37…

MALICIOUS

PDF

86.7 KB Created: 2021-01-04 05:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 17f31de9e90033da4610814fc767237d SHA-1: ea4089a7168db5214a30c536a61c8c2050b52517 SHA-256: 8c693105e4bdff37d9c50213d1fd567196a8510374c922da878d1d9c29b231cc
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting its primary purpose is to lead users to harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=ff14+battlecraft+leves+70-80 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5f9ad924c780b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378830/normal_5ff28436e6f6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f8f035e0a398.pdfIn PDF document text
    • https://tetemubegogik.weebly.com/uploads/1/3/4/4/134443084/67a8524a5ae72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fb7838b463ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5fa4e4a1d736d.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/jvQibhj/92478606643.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/4gc1gc2/wifinamubipegadadaka.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/a72eb7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381108/normal_5fa2e9ade7833.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ce835b4e-3ad1-46b9-a3e7-8a76c7c321f4/basalilalilikugafuw.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 5140 bytes
SHA-256: 06248a921ebeb6623528817e4e1009ee23cb179d66a5b64ac29aa95aba537deb
font_01_sfnt_off00011171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11171 1608 bytes
SHA-256: fe7b70e31f4beac1d1e0e7bfceb73fe89266936216fa5333d5a49d4a04430ade
font_02_sfnt_off000119ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FF 10840 bytes
SHA-256: 441edd01dd71c9e905d672b39fc352389d003afe2491bbacedba40100f84c974
font_03_sfnt_off00013eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EEB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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