Malicious PDF — malware analysis report

Static analysis result for SHA-256 f339e341db727c2b…

MALICIOUS

PDF

65.9 KB Created: 2020-12-18 17:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fed8a3e625b0642a58689a74164e37fd SHA-1: badb797acc46b7418f86833c088aac73c739afe6 SHA-256: f339e341db727c2bd3f22be545096cd3077beb69efab187286865d274ce6fb3e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to 'traffset.ru' and disguised as a game mod download. This suggests a phishing or malware distribution attempt. The presence of many external links, including a PDF link farm, indicates an effort to obscure the true malicious destination or to generate traffic. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=league+of+stickman+apk+mod+5.9.1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f945f903b12f.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/wimizuniku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413235/normal_5fab51c62b980.pdfIn PDF document text
    • https://zatajiwivovib.weebly.com/uploads/1/3/4/5/134529671/nanuxedufozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496810/normal_5fad9d8907f77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5fdbc71e42d61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417327/normal_5fc8d3e7848b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f8b0eb498a87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukajevo/lumisujobajunabevitufigip.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/angus_and_coote_ring_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/tracing_alphabet_letters_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/73129676849.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/suxotikafapodirozugeju.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_off0000c35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35D 5716 bytes
SHA-256: c6e067f493954c01d2423c86e59e2d14dbbcf16d746956efe313632ef2c3c3eb
font_01_sfnt_off0000d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E5 10536 bytes
SHA-256: 889abacd1ce1deadbdc9d6eba91038e107483d97c9b3ec1d99ae1d73a1b450a9

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