Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ace3b80f2d1881e…

MALICIOUS

PDF

71.6 KB Created: 2020-11-23 13:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c627aaaef8be8980850a07dd99b124d SHA-1: 5e8386276c4ad381427911214d0bbc06648ae7ed SHA-256: 2ace3b80f2d1881ef671f9554cccc2bbcb36a4c0d2a19f8679416ac2d301f276
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'traffset.ru', which is flagged as unknown reputation, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that appears to be a lure, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=mis+cursos+tecmilenio.+mx
    • https://lisamotakix.weebly.com/uploads/1/3/4/3/134308999/rigesozoxifole.pdf
    • https://cdn-cms.f-static.net/uploads/4447464/normal_5fb03cd4cdae0.pdf
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/lavigubum-losijufelew.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/kaven_lidotobin_robisud_tepefobinijowaf.pdf
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f87583a39a28.pdf
    • https://nufulukoveta.weebly.com/uploads/1/3/4/7/134700555/zezazutuxaxujaso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/16e9e07c-9fa7-436c-b044-a1c4a177243e/jirijukepul.pdf
    • https://uploads.strikinglycdn.com/files/8d3822af-7184-4308-95dd-fcb3c5021fb0/ffxiv_triple_triad_guide_reddit.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/outlook_com_login_gets_ga.pdf
    • https://s3.amazonaws.com/jepinebawo/gepubolufevisesujijofi.pdf
    • https://uploads.strikinglycdn.com/files/737fb62f-3e27-4aaf-b571-cc2086351469/jakolakos.pdf
    • https://uploads.strikinglycdn.com/files/de2648de-1570-41d7-96d3-29041a32e088/bill_of_sale_template.pdf
    • https://s3.amazonaws.com/wenobagupexekap/71486730291.pdf
    • https://s3.amazonaws.com/lupuvogotog/64614723641.pdf
    • https://uploads.strikinglycdn.com/files/07a8f815-e08c-4239-b272-831a39997bce/85426119829.pdf
    • https://s3.amazonaws.com/sojuravewi/kidney_health_australia_dialysis_unit_guide.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_off0000d149.bin
73adf0dd3dd24c337cf8c4ddee6ed6730a4d7aa4534854cb5a02aba9794e1317
pdf-font-stream PDF embedded font (sfnt) at offset 0xD149 4724 bytes
font_01_sfnt_off0000e142.bin
e2e8cec5e6e64728299a75c2ad910e89653991215b11545864cfae6432145863
pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 10096 bytes
font_02_sfnt_off00010377.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10377 4324 bytes