Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cccced16fda0203…

MALICIOUS

PDF

78.8 KB Created: 2020-12-25 04:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 10ba29a336fd29536611e04f836920da SHA-1: a19f3f9c0bd715900ba72fce21f79feae05bbdd4 SHA-256: 0cccced16fda020376ca7fdda138ac3cbf1b1a6871cf06014eecbe11fb5d35ae
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI pointing to 'trafffi.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body contains obfuscated data, and the authoring application 'wkhtmltopdf' is sometimes used to generate malicious PDFs.

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://trafffi.ru/strik?utm_term=csr+classics+240z PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495265/normal_5fab02511f8ce.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/R5DUv6H/traffic_road_signs_meanings_philippines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5fbeec267ce1b.pdfIn PDF document text
    • https://cdn.sqhk.co/xibumediw/Yggunha/tag_with_ryan_combo_panda_code.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/GSigTU4/36636165094.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/hjbjXjd/event_tickets_plus_shortcode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490752/normal_5fafb82037468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_5fac1e8746b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_5f8fa1fe33770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_5fa0495a7f7ee.pdfIn PDF document text
    • https://cdn.sqhk.co/lojavowi/R2w3eIY/67249462090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444114/normal_5fca9ecb8354d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/7649e131-4964-45d3-bf0b-6f99aa3bf37b/jewakogexijima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da8c1e63-1147-4a07-a9af-e86e25901b05/porotakiwidinalage.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/peoplesoft_pum_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c2754df-c31e-4103-b918-1eaf81297ddd/school_calendar_2016_mauritius.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 5112 bytes
SHA-256: cf13fa8eac82e44cb717af60822fc22a73185c67f3c5ff130989391eb630cf0d
font_01_sfnt_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 6956 bytes
SHA-256: d3d0452b568bb62a889173d35ec23f6aa2db53053c650b6da294f8d39e8841ad
font_02_sfnt_off000108e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E6 10836 bytes
SHA-256: 7af6d8c72aadab973af6c22fc9e7eed7f1fbd58bcdd9ae524fd460a7f404cdc3

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