Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bd71cc40d4d4b7…

MALICIOUS

PDF

70.5 KB Created: 2021-02-24 01:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 51118961ef4c2abfe8fd00154e203a3e SHA-1: e356d73952fe9829712739e041d195d029889fb6 SHA-256: e8bd71cc40d4d4b7b30366a3e42c361b140b4f48d35ae47bcc1edabb4405fac9
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, which is likely used to host a malicious payload or phishing page. The document body, though partially corrupted, suggests a lure related to a recipe, consistent with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/aws?utm_term=black+sesame+powder+ice+cream+recipe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483870/normal_602a341e319c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_6017368bc57a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466676/normal_60221967252f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_6034c75fb34bc.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/uihD2jc/minecraft_pocket_edition_online_free_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_60180899ed9d0.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/3rggkUV/chess_rules_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/djcf5tq/57039709380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_6010040d67767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_60121988a6f16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412599/normal_5fec9d8adc62c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mijumomub/beautiful_child_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/fegekawatixomajinavamuz.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_off0000d79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79B 5424 bytes
SHA-256: 3041ef1f5d66eb941b9cb616d72de49075ab93a20958d802dc5adea68fcb553c
font_01_sfnt_off0000ea0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0B 10544 bytes
SHA-256: af7d3b3755096eccae156b307f9d7544482cabba3b09af78f16fca7ce5b21142