Malicious PDF — malware analysis report

Static analysis result for SHA-256 674b9b716b0be3cb…

MALICIOUS

PDF

72.1 KB Created: 2020-11-26 02:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cd96db93b3dfe12e1106a0acffd40860 SHA-1: 1818036abce889eae2a2c26e5e0d80bb991672b9 SHA-256: 674b9b716b0be3cb611a1079a079426d510e7d452511850ecd82933be86a2370
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect users to malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=maze+runner+newt+death In PDF document text
    • https://cdn-cms.f-static.net/uploads/4488322/normal_5fb460710c2a8.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/xawazugamedexot.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/napuzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5fb824747be79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f91dd66919f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8a1629d8fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456398/normal_5fa7a2ee2cb90.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/143770975051109.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/riluxijozepeba-levimepumob-lokepaxan-depufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420743/normal_5f98564342d62.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/c8df1478-a325-49b4-bc69-952a9e1be521/kumedusegekefeku.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/bike_fit_guide_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/forever_21_coupon_code_2020.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_off0000dc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0A 4852 bytes
SHA-256: a5a3f823eeb8d9d3d1850484e6b934c551d9a9e3326ebd37cd3b6026dcddb955
font_01_sfnt_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 11396 bytes
SHA-256: 6dc6657b6c8b24ed2dcdeff880b159ac9ee8a3beba0bbcf67812e63ecdc84e94

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