Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ae687e34ed5ecb…

MALICIOUS

PDF

76.8 KB Created: 2021-01-03 18:47:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 94e87a5c494365c95c52239dda0d7e63 SHA-1: 7dc7de18e6fc0975f809509a1bea034258c61499 SHA-256: e7ae687e34ed5ecb15a8e88f5c978fdf4099ec617b6b2d9086e4f4bbeea7e2df
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The primary external URL observed is https://trafficel.ru/123?utm_term=plowz+and+mowz+revenue, which is likely used to direct users to malicious content or phishing pages.

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://trafficel.ru/123?utm_term=plowz+and+mowz+revenue PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486772/normal_5fc91dd96a48e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_5fd69b53b3f1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5f8ccd1217b64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_5fadda5994a88.pdfIn PDF document text
    • https://fanuxerejupu.weebly.com/uploads/1/3/1/3/131398214/4586071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_5f903e12a6583.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501037/normal_5fdcd4163b8e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494663/normal_5fdbe021b49f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fixararololu/auschwitz_visit_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/743d4665-533e-41df-b5c4-09ae40280d70/19895337735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868f4c87-7760-4bb8-82b2-8fe9a529ff0b/14434635532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051e380b-7f12-46b1-9481-6f248fcb0336/50820512094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5585af7-2596-4ef7-9496-e01cf71c6995/30614218387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d06eea-45a6-4a74-8b0c-e15545be9731/83401419336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68178a50-90f9-4c12-97ed-659ba47355cb/pujagukuxiwi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32F 4748 bytes
SHA-256: 0bdbddcd2d051d135be9861b9658725085e93390871aa84c7e49e8894a73409c
font_01_sfnt_off0000f342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 10936 bytes
SHA-256: e82dd874100f51009230a4e1bf844d5d8779c4a6d57922e0663e90545ff15cea
font_02_sfnt_off0001189c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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