Malicious PDF — malware analysis report

Static analysis result for SHA-256 a672164e040314f1…

MALICIOUS

PDF

69.3 KB Created: 2020-11-11 00:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40cfd3e0fabdc86aa65e2e42763caac3 SHA-1: dc09c25c5340229655b9e9cb8dfe09da0dfa1be2 SHA-256: a672164e040314f19e5295fae2ac8fe6ca26628cbb3ba7391cd1a576b1382571
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website disguised as a timesheet calculator. This URL is flagged as malicious and is likely intended to lead the user to a phishing or malware download page. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?keyword=timesheet+calculator+with+lunch+breaks
    • https://cdn-cms.f-static.net/uploads/4402721/normal_5f97cff10c386.pdf
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5f94aabb4ff7f.pdf
    • https://cdn-cms.f-static.net/uploads/4412154/normal_5f99051368a84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jewizopukuni/gekelerizarasovomenivitex.pdf
    • https://uploads.strikinglycdn.com/files/9893364b-58c7-4cbf-99ef-2ef40d764b01/vodavekel.pdf
    • https://s3.amazonaws.com/simujix/mimerunop.pdf
    • https://uploads.strikinglycdn.com/files/55869897-b70a-4962-b5d9-bc57c888485b/92448627720.pdf
    • https://s3.amazonaws.com/sugosubexez/tesikokim.pdf
    • https://uploads.strikinglycdn.com/files/3d975144-bc38-474b-a65d-c87db01bd296/23846282508.pdf
    • https://s3.amazonaws.com/rotafasaniz/53437700423.pdf
    • https://uploads.strikinglycdn.com/files/f66bfbf1-a0a8-45c4-9ca1-80b73c58319a/32862758338.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_off0000d308.bin
398348db54c8bc16dd5015be0beac42c0fea3c1d29b52f0e3ff610df4760e219		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD308 5284 bytes
font_01_sfnt_off0000e4e7.bin
9493542c837902b680f7f5c8db2356cbb12942f169019751871e74134b5731f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E7 10568 bytes

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