PDF malware analysis — malicious · 3cf5cd768ab4d119

MALICIOUS

PDF

79.4 KB Created: 2021-02-28 18:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: baaf197784ec02de66f6ebb928b95082 SHA-1: 36d5767af93452f5638c6d3482be2bf4e74c2ab8 SHA-256: 3cf5cd768ab4d119451b50135ad4aa44115e4db34281df975a770e4292e7d354

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of an advance-fee scam. The document body and extracted URLs suggest a lure related to a "night packet answer key" or similar prize/delivery scam. The presence of external URIs indicates the potential for downloading additional malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE

Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
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://jacksth.ru/wix?keyword=night+packet+answer+key
- https://static.s123-cdn-static.com/uploads/4368479/normal_5ff2796f4db51.pdf
- http://kigonowepim.iblogger.org/symmetric_encryption_vs_asymmetric_encryption.pdf
- https://cdn.sqhk.co/rogekanus/hEji8F5/xeradijimoz.pdf
- https://cdn.sqhk.co/noluxokeruma/a3hd8ig/bingo_battle_stages.pdf
- https://cdn.sqhk.co/fifunolew/ARkhfcg/webibakeketupulejise.pdf
- https://static.s123-cdn-static.com/uploads/4485711/normal_5fcd2fa590d68.pdf
- https://cdn-cms.f-static.net/uploads/4406514/normal_603828c6d5c4c.pdf
- https://cdn-cms.f-static.net/uploads/4486965/normal_5fe9f05553054.pdf
- https://cdn.sqhk.co/niwonosorude/bWLiemZ/ion_vacuum_robot.pdf
- https://cdn.sqhk.co/suxujaba/hhzijxR/xefexupapaf.pdf
- http://titujewegefo.iblogger.org/vizemixavabujezobewovif.pdf
- https://cdn-cms.f-static.net/uploads/4457000/normal_6033ac7b70f40.pdf
- https://cdn-cms.f-static.net/uploads/4415051/normal_5fd5f2f3586b6.pdf
- https://static.s123-cdn-static.com/uploads/4384142/normal_5fed361686d7c.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://ruxuvejefo.epizy.com/8-_1_puzzle_crossword_answers.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fb15.bin` `5949e58225f87ffe6356c390365e66367e9c48b286abbbd797c5dc924ee381e5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB15	5392 bytes
`font_01_sfnt_off00010d86.bin` `395957ae7b7e1c99251ee0009bbbdab49f69227aa6fab6aa36dcd4c05e17d1b3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D86	10348 bytes

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