PDF malware analysis — malicious · 1bccefdec81a4bbb

MALICIOUS

PDF

70.6 KB Created: 2020-12-07 06:38:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 591ed56d2d1e2d5412302436b775bf43 SHA-1: 1cf5aa45a2ca8df50af568c6d6e1327a8d11e0e3 SHA-256: 1bccefdec81a4bbb5880818746c4893133a20fcb98ef8f5f004fb56fb8c805d5

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 'trafffe.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs indicates an attempt to redirect the user to a malicious site.

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://trafffe.ru/aws?utm_term=waterfall+approach+pdf
- https://fefojaza.weebly.com/uploads/1/3/4/4/134480993/ramewogoromemi.pdf
- https://penepanixefi.weebly.com/uploads/1/3/4/3/134354239/mupuvi_sozivivadozis_webovulew.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/zaxuledo/certificate_of_conformance_template.pdf
- https://static1.squarespace.com/static/5fc316c9a5bc066edfb3e2e2/t/5fc7c90c2b4aac184474696d/1606928655758/29906318700.pdf
- https://static1.squarespace.com/static/5fc0e734ec917750a3d7e8d7/t/5fc538113485235c866fef8a/1606760466670/memento_mori_short_story.pdf
- https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe422e08845d0924569243/1606304304044/45313255998.pdf
- https://s3.amazonaws.com/gowupuzokowuxes/nenigatutomubeker.pdf
- https://s3.amazonaws.com/fodose/4205467361.pdf
- https://s3.amazonaws.com/dojivewobasuval/oil_breakdown_voltage_test_in_transformer.pdf
- https://static1.squarespace.com/static/5fc5c475c89e1c4b8fdffacc/t/5fc7083fc7c45a5eaf9cb53c/1606879304892/3_yellow_classic_game.pdf
- https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf569b4f98375720d754d9/1606375067837/dumavubujetefusenikanofa.pdf
- https://s3.amazonaws.com/vabedafozo/78491214431.pdf
- https://static1.squarespace.com/static/5fc57d17d26ff1194f92edd5/t/5fc778e17995075abde5bb64/1606908130479/drum_pad_machine_app_for_pc.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d6e0.bin` `11a5a720f0e281ca50e164350443224842f3db2c40f4d443f14984f14132c914`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6E0	5080 bytes
`font_01_sfnt_off0000e834.bin` `56fb790b4a29a0149a1281ae552eeb472b3333b22047969a652b577bdf951597`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE834	11120 bytes

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