Malicious PDF — malware analysis report

Static analysis result for SHA-256 306f4d6a6071d3ab…

MALICIOUS

PDF

82.5 KB Created: 2020-11-28 21:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7407ede43a3d93d085643a35eb07506 SHA-1: 93e34c923bbed5e0a9e8bc82eba6e8424c3b78d2 SHA-256: 306f4d6a6071d3ab0cdf365730eb092030ed550a1b3d2251d7814df29b02d13c
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution.

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://traffnew.ru/aws?utm_term=aashiqui+movie+songs+free++naa+songs
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f882200d6dfa.pdf
    • https://cdn-cms.f-static.net/uploads/4449769/normal_5fb97e6477c3e.pdf
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5faf519fb311a.pdf
    • https://cdn-cms.f-static.net/uploads/4420766/normal_5fa3aaa3747d5.pdf
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f8e3645ad55e.pdf
    • https://cdn-cms.f-static.net/uploads/4477139/normal_5fb55a935cb11.pdf
    • https://cdn-cms.f-static.net/uploads/4388293/normal_5f8e898a6151c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6d448178-eeb5-4970-9a86-047d4e623e9e/caterpillar_diagnostic_software_down.pdf
    • https://uploads.strikinglycdn.com/files/88ca4c73-d503-4375-9f87-13436b41136f/basketball_game_online_unblocked.pdf
    • https://uploads.strikinglycdn.com/files/e64a9d9b-5f39-4815-ac41-93ea4ae57c74/9991391589.pdf
    • https://uploads.strikinglycdn.com/files/a42c937e-9748-440a-a96c-8e8585a89403/great_transformation_worksheet_answers.pdf
    • https://s3.amazonaws.com/vatosolikijike/gba_emulator_2018_free.pdf
    • https://uploads.strikinglycdn.com/files/177e0f71-761a-46cf-8a8c-a1935c438927/angle_of_repose_book_review.pdf
    • https://s3.amazonaws.com/jedadokuti/63163525068.pdf
    • https://uploads.strikinglycdn.com/files/f26bddea-328b-4ce3-86ba-6f368cb01be2/92767415671.pdf
    • https://uploads.strikinglycdn.com/files/743f7c01-c627-4258-a555-c1b65ad8f217/13216223196.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4be.bin
7544db523e5c8e6a39659162a52f3d4d88a87db36943f75720489e86592bfceb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 5124 bytes
font_01_sfnt_off00010608.bin
b8ef606d809690a22489ca629bbcd1dbe4a5f5937f1bad009560aae480d24b69
pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 12992 bytes
font_02_sfnt_off00012ec3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC3 4324 bytes