Malicious PDF — malware analysis report

Static analysis result for SHA-256 0111c56bc8ef4c37…

MALICIOUS

PDF

79.5 KB Created: 2021-03-30 03:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b02a61168a938a8dfbc7564a77b94666 SHA-1: 22095782fdc704e180ca0f4cd0812863e8fdad17 SHA-256: 0111c56bc8ef4c37e3a1bf97faf83395771647322aa11a3a41f5d575b3ec7d8a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that mimics a search result, directing users to a suspicious domain. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site, likely for credential harvesting or further payload delivery.

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://maypoin.ru/award?keyword=general+dynamics+time+capsule+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420745/normal_5fdc544b48caa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471481/normal_5fdcdb3173c8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482625/normal_5fffedb6eed53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486563/normal_604dbaff60a69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456121/normal_5fcdb5ea5a585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_6029c98c1e53a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483354/normal_5fd78caa40506.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368750/normal_5ffed51146407.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/dogikodusipanumonapakomkr1qn.pdfIn PDF document text
    • http://gnfcns.info/icewind_dale_2_complete_reviewaqx2r.pdfIn PDF document text
    • http://fly-drive.online/27071587879td3qn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450506/normal_5fec73f2a4307.pdfIn PDF document text
    • http://jadebey-x.com/demin4i4mq.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/9ff83119-36ef-46e9-bb81-c5673e1ddb27/bachelor_pad_economics_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/hair_cutting_hd_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/skinny_love_chords_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4426e517-fe26-4ef7-b363-c760ef0a5b47/how_success_in_network_marketing.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_off0000f939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF939 5640 bytes
SHA-256: 11c09a7aeb3d32b1bf372295e4232754e7966aae9fc984244ece8cab162be0e2
font_01_sfnt_off00010c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C59 10560 bytes
SHA-256: 850059b7ce94492b1b53d56d5c20300ecdb025903e97e75fd9736bd24cb46182

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