Malicious PDF — malware analysis report

Static analysis result for SHA-256 616482bc7c6a6405…

MALICIOUS

PDF

72.5 KB Created: 2021-01-08 17:47:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15d8ae1a431e59f269ae3a7a7e43dd57 SHA-1: b70e03a61130d6e6c3ed49310fd449a9e2dc4100 SHA-256: 616482bc7c6a6405d63e42b0a060568d84bbcbd1dc0dbe5f47b8fbd975d7e762
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting an attempt to drive traffic to malicious sites. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/aws?utm_term=song+saathi+haath+badhana
    • https://faliroralomi.weebly.com/uploads/1/3/0/8/130874474/febetewe.pdf
    • https://zipemulobob.weebly.com/uploads/1/3/4/5/134528333/3a0c1.pdf
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/92a9a139.pdf
    • https://cdn-cms.f-static.net/uploads/4391009/normal_5fdc0c3a791c1.pdf
    • https://cdn.sqhk.co/koxixoneto/ggHjbii/tiwobebupipavepifopuju.pdf
    • https://fisujurij.weebly.com/uploads/1/3/1/4/131437504/dusuvobu.pdf
    • https://static.s123-cdn-static.com/uploads/4421350/normal_5fdcefc165c6f.pdf
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5ff75e6ec5fd2.pdf
    • https://static.s123-cdn-static.com/uploads/4382208/normal_5ff62e75b8926.pdf
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f886037697de.pdf
    • https://cdn-cms.f-static.net/uploads/4401976/normal_5fbe2d1c90d62.pdf
    • https://cdn-cms.f-static.net/uploads/4444104/normal_5fd1254f4c972.pdf
    • https://cdn-cms.f-static.net/uploads/4469359/normal_5fa6b9db193a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cb2f9a31-4cfe-49f2-a925-d65a066ec831/activation_energy_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5aa.bin
1f477f995797c2638ea19663ab591721aede31f7ca430411ea88135b1fcb7438		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 5204 bytes
font_01_sfnt_off0000e755.bin
6b06879f184881561e200d06cf352adaa361fa8f6054c00b31d9671ac5a9a4d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE755 14896 bytes

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