Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c70f6556a0f9b3b…

MALICIOUS

PDF

69.3 KB Created: 2020-11-21 02:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc6cc1739442bc65db1a4fa42398ffcd SHA-1: 136cbacf1c7136bf3ac2880762b6dc7ecdeb801f SHA-256: 8c70f6556a0f9b3b69211ddfba54f477264af1f051a34b79c338e91aa106d658
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. The document body, though heavily obfuscated, contains text related to 'home design makeover mod apk free download', suggesting a lure for users to download potentially unwanted or malicious applications. The presence of an external URI pointing to 'traffking.ru' further supports this, as it likely serves as the download source for the promised "mod apk".

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://traffking.ru/123?utm_term=home+design+makeover+mod+apk+free+download
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f893d887b9ab.pdf
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f87a3eeb2078.pdf
    • https://cdn-cms.f-static.net/uploads/4417325/normal_5fa730481fc60.pdf
    • https://cdn-cms.f-static.net/uploads/4393029/normal_5fb85cf40e594.pdf
    • https://cdn-cms.f-static.net/uploads/4409000/normal_5f996960aebb7.pdf
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f93b0966610c.pdf
    • https://cdn-cms.f-static.net/uploads/4412391/normal_5f9d4b88da40e.pdf
    • https://cdn-cms.f-static.net/uploads/4389127/normal_5f9be67b039c2.pdf
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5fa9afef60366.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7e4b5dd7-4530-44f7-9286-580faaecb9f9/52855920996.pdf
    • https://uploads.strikinglycdn.com/files/7ae838f4-6ebc-4c74-9743-cd9093a8ee0c/challenger_ch_1000_manual.pdf
    • https://uploads.strikinglycdn.com/files/b551b353-82f6-4364-b809-2d1e30048546/julofapobibiwo.pdf
    • https://uploads.strikinglycdn.com/files/ca02d4b8-9697-43a0-97ee-8e76ade2e6e9/31448518128.pdf
    • https://uploads.strikinglycdn.com/files/1a0233f5-07a4-44ec-b6e4-2fb67bdf3453/dog_wheezing_and_throwing_up_white_f.pdf
    • https://uploads.strikinglycdn.com/files/3a2c8110-882a-42e6-8bc9-b1f8ca5884c0/sundance_spa_owner_manual.pdf
    • https://uploads.strikinglycdn.com/files/d8840431-f9aa-48ec-956c-336df2689ca0/zilogivoxenup.pdf
    • https://uploads.strikinglycdn.com/files/aca21167-9c74-4e0f-a777-c03632ebd10d/trke_paragraf_sorular_4._snf.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.

FilenameKindSourceSize
font_00_sfnt_off0000cf4b.bin
d4b1ac9d7a0a65394a0a4de95bd1d1f49266c340c45df1d41241ee4ad2adc73c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4B 5540 bytes
font_01_sfnt_off0000e21c.bin
1a9504b3e5aab53d133b10479dc03d06115802ea57bd9d481837f3f8a8a4e744
pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 11120 bytes