Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86193a74bb3c5c3…

MALICIOUS

PDF

68.8 KB Created: 2020-12-16 02:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a0eecda1cb5c8ea3b30073e1387fbd58 SHA-1: e727c2a90789622fb7c8836fdf38eff125c18c51 SHA-256: e86193a74bb3c5c3d6c7dc20d14b0a28829173637721e52aeadd01172ba13a34
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and ClamAV as malicious. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of an external URI suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=ik+bruhn+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444110/normal_5fc8023f37199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_5faa3b0a45d95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470553/normal_5fb8144887d7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419849/normal_5fa4b0551977c.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/4682971.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489844/normal_5fc6062ac5b78.pdfIn PDF document text
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/xesuxe.pdfIn PDF document text
    • https://kalizijowu.weebly.com/uploads/1/3/4/7/134733304/dajunese.pdfIn PDF document text
    • https://puvujoda.weebly.com/uploads/1/3/4/3/134326666/xirejudabajumesibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447915/normal_5fc3341c487cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0bdc717e7202640e9644a/t/5fd02e4f8f1ddd5ccbd42ed1/1607478863977/74473592332.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc066c960f2895dc1e54813/t/5fc0fe871972c46e3cc1fb95/1606483592299/wivivenabolem.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_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 4848 bytes
SHA-256: a733c4c9ddc27599a752f8af5c99978b04a40abb4c7dd84f567fd0f65bd89f8a
font_01_sfnt_off0000e224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE224 10404 bytes
SHA-256: 17c5deb8e5539c68d6b12b2b7711b1edf0fc765c209268735e34ce54097734c3