Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf514d164e10afc7…

MALICIOUS

PDF

66.9 KB Created: 2021-05-30 19:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 204c215dc249d3515182f52fd5772892 SHA-1: 1fb51aa494158fc813866dc55c72dcc1cc132fde SHA-256: cf514d164e10afc794f739103079a58ef9023241a1da702f9b7fa05c73e94ed9
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 a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The PDF structure itself does not contain readable content, but the presence of the external URI strongly suggests a phishing or malware delivery attempt.

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://vilenefex.ru/strik?utm_term=classic+bingo+-+%2528offline%2529
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5fe8b9abc6250.pdf
    • https://jegupifak.weebly.com/uploads/1/3/4/0/134018348/0e7d91276.pdf
    • https://static.s123-cdn-static.com/uploads/4376379/normal_5ff29d58e61aa.pdf
    • https://bamususifilozok.weebly.com/uploads/1/3/1/3/131383301/6828401.pdf
    • https://ruzisatof.weebly.com/uploads/1/3/4/7/134734885/5158818.pdf
    • https://static.s123-cdn-static-d.com/uploads/4501385/normal_60affb356f076.pdf
    • https://static.s123-cdn-static.com/uploads/4393044/normal_6006983750cac.pdf
    • https://static.s123-cdn-static.com/uploads/4392651/normal_5fe537790064b.pdf
    • https://static.s123-cdn-static.com/uploads/4452846/normal_60054735112ff.pdf
    • https://jinuwipalo.weebly.com/uploads/1/3/5/3/135332432/gowakavufozujupef.pdf
    • https://static.s123-cdn-static.com/uploads/4459337/normal_5ff49a235191f.pdf
    • https://static.s123-cdn-static.com/uploads/4494147/normal_5fce4bfdf2a49.pdf
    • https://cdn-cms.f-static.net/uploads/4378845/normal_60648a355ca86.pdf
    • https://static.s123-cdn-static.com/uploads/4404987/normal_5ff933eec725f.pdf
    • https://static.s123-cdn-static-d.com/uploads/4483083/normal_60b04bc91f1ed.pdf
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/3715345.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d7658073-41fe-430b-8941-170b92741388/how_does_luke_know_leia_is_his_sister.pdf
    • https://uploads.strikinglycdn.com/files/597edc50-2452-4b5b-a0d0-e24f0146bafa/pollo_loco_double_chicken_tostada_salad_calories.pdf
    • https://uploads.strikinglycdn.com/files/84d03080-9000-4db8-90dc-4c11f817749a/how_long_will_a_10000_watt_generator_run.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.

FilenameKindSourceSize
font_00_sfnt_off0000c854.bin
0dc7414299f6f85aad562bff84d7f1670f5366801a4ea9df4737916dbf0614a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xC854 5184 bytes
font_01_sfnt_off0000da25.bin
aa7597c68f044e61ed771a759d374b6051a40d7d0c06157d1989f2960b4f39e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA25 10604 bytes