Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cff7198cc538325…

MALICIOUS

PDF

75.0 KB Created: 2021-04-03 12:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 619cbf314e87797e5fc21f467ee74ddd SHA-1: b23fb2dc5d69f00a9ffebe03d2f20ad90672e96a SHA-256: 7cff7198cc538325886c6c18cffa02c33b78dd8e33b81058ea8fa5c59b744b7f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely used for phishing or distributing further malware. The document body, though heavily obfuscated, suggests a lure related to tobacco discounts, reinforcing the phishing hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://kuzutuzo.ru/wix?keyword=discount+tobacco+shoppe+nashville+tn
    • https://cdn.sqhk.co/logulemuset/hakhaVo/monkey_bread_muffins_southern_living.pdf
    • https://cdn-cms.f-static.net/uploads/4453754/normal_6026667d27222.pdf
    • https://cdn-cms.f-static.net/uploads/4489983/normal_6039fe954d2e6.pdf
    • https://cdn.sqhk.co/sedazozesufu/heqjaFD/12763075700.pdf
    • http://idealica-ufficialeitalia.website/16994766647cfe6q.pdf
    • http://betflixguvenilirmi.com/apush_concept_outline_period_1_answersgs7ho.pdf
    • https://cdn.sqhk.co/xekemini/9xg2uCG/20151734363.pdf
    • http://siderevakeforu.22web.org/cartina_politica_puglia.pdf
    • https://cdn-cms.f-static.net/uploads/4382187/normal_605eefef0255a.pdf
    • http://dozujub.22web.org/acca_f9_bpp_study_text_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4374951/normal_600ce2f303436.pdf
    • http://lotofotu.iblogger.org/muwiragenipopok.pdf
    • https://static.s123-cdn-static.com/uploads/4412758/normal_5ffa069944437.pdf
    • https://cdn-cms.f-static.net/uploads/4492286/normal_5fdb221ad9393.pdf
    • http://xikimifo.66ghz.com/coordinate_plane_worksheets_fun.pdf
    • https://cdn-cms.f-static.net/uploads/4459176/normal_6035f02e7665f.pdf
    • https://cdn.sqhk.co/salasereki/b8W8hd5/naxojiravidekerireka.pdf
    • https://static.s123-cdn-static.com/uploads/4495846/normal_5fc721bba5f62.pdf
    • https://static.s123-cdn-static.com/uploads/4470696/normal_5ff666e2e06d8.pdf
    • https://cdn.sqhk.co/xuvetuzaxi/icuRehj/fabeludewej.pdf
    • https://cdn-cms.f-static.net/uploads/4451365/normal_6047e3f68f2bd.pdf
    • http://bullbananavannaone.xyz/206390252817ovvj.pdf
    • https://cdn.sqhk.co/kibutonap/gjF6gfY/boreripovuzezub.pdf
    • https://cdn.sqhk.co/gojinuma/ibRxSid/national_geographic_magazine_subscription_gift.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tesoxukezeziles.epizy.com/dillon_650_for_sale_uk.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_off0000d8c5.bin
3069e2e24be5d5d321633e7d319296478fe0ab20e892b05757cf679ba3b3b14f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 5004 bytes
font_01_sfnt_off0000e9c4.bin
c1c831d20a52a1057a6c5a2ce964e0efc1f60d88686077c0eefdd2cacd9c513f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 10984 bytes
font_02_sfnt_off00010e98.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E98 4324 bytes

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