Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca58cb6e0b4b5f4f…

MALICIOUS

PDF

83.3 KB Created: 2021-03-28 04:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ab5fc2f347970829ad83f0ecdac2f050 SHA-1: 7eab25ef1034b7bd1630cc14775f6d07611c14ca SHA-256: ca58cb6e0b4b5f4f133fe82ff96fe034f026106104f0fee8fc6bf2cd57597999
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to '7 steps software development life cycle', which is a common tactic for phishing or social engineering.

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://lozipotod.ru/strik?utm_term=7+steps+software+development+life+cycle PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368266/normal_5ffdecde9454f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490950/normal_5ffdaffad875d.pdfIn PDF document text
    • http://latencfsrt.space/android_tv_box_flow4fdw6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372087/normal_5fedf3ec365e1.pdfIn PDF document text
    • http://mexicotop3.xyz/t-flight_hotas_one_ace_combat_7_xbox_one7q62s.pdfIn PDF document text
    • http://slmit.fun/top_rated_upper_arm_blood_pressure_monitorsx84v0.pdfIn PDF document text
    • http://save50.pro/zinadowulajiwedodasezihrs1m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_60112d22096cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a598ac-1afd-4c94-bea9-0e696a647f0d/what_make_washing_machines_are_being_recalled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ad1c76e-416e-4936-87f2-3de5bbd50714/3352579544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ffdd775-6d92-4fc9-bc3c-5993644cf984/wekeloba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b2e9284-8dcc-42e8-9610-d669c85d0535/jonapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc101b4a-e2b4-4e21-b68b-87daa487c707/redewixatop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8630e28b-c34b-41af-80e2-2e729580eaf4/how_to_write_a_narrative_speech_about_yourself.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72396de1-ff32-40bd-8de7-c53954ee6688/introducing_python_2nd_edition_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/382375e6-e5d4-4768-880a-cd27f14a64eb/65765193239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefe7de5-9c52-422c-a569-87bb865112ed/lamikososuvuvamugozanow.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10700 5540 bytes
SHA-256: 0cdd6ae60e9111d788f8d67127d2b5d1244ac5c6ea6bd122407ccb1444dcb79d
font_01_sfnt_off000119e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E2 11196 bytes
SHA-256: 0d1339de5012a89493aeb7e3fa7b9adba2189d44cf133fe68c57abac0c13f353

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