Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb6b551f72edb02…

MALICIOUS

PDF

74.9 KB Created: 2021-01-06 05:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c044781d45e2e01df6b08430ac4fadc SHA-1: 756a2bfc39262f145fb79d53c604cff2513f63c6 SHA-256: adb6b551f72edb02bdc0a4d7e79b5cb2ca114053e63303ab970133abda47380a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, traffking.ru. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further malware.

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://traffking.ru/aws?utm_term=vsco+full+pack+terbaru+2019
    • https://cdn-cms.f-static.net/uploads/4469350/normal_5fa4a8af4b5ad.pdf
    • https://cdn-cms.f-static.net/uploads/4417818/normal_5fe610d68ab22.pdf
    • https://cdn-cms.f-static.net/uploads/4458848/normal_5fad47da99648.pdf
    • https://cdn-cms.f-static.net/uploads/4462037/normal_5fd81b9fa9fa1.pdf
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f9cd44a0f039.pdf
    • https://cdn-cms.f-static.net/uploads/4450347/normal_5fba67022993b.pdf
    • https://static.s123-cdn-static.com/uploads/4489440/normal_5fe077f504821.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f4f251e9-399c-4c70-9e33-d756a7b3082c/dog_groomers_new_port_richey_fl.pdf
    • https://uploads.strikinglycdn.com/files/706e2666-891b-4ac4-acbd-2c259a3cfb03/loxifu.pdf
    • https://uploads.strikinglycdn.com/files/19a968e8-1b6c-4137-bd31-fe9e032aa8e2/great_gatsby_quote_review_challenge_answers.pdf
    • https://uploads.strikinglycdn.com/files/08e4c0a6-2537-4e2e-ae9c-9b74a9a69956/chrome_hearts_ring.pdf
    • https://s3.amazonaws.com/mefadedosuw/essence_of_magicka_teso.pdf
    • https://uploads.strikinglycdn.com/files/77c79a27-83a6-4fa9-9384-529c17f38bc1/nexen_roadian_at_pro_ra8_review.pdf
    • https://uploads.strikinglycdn.com/files/41c6e915-b2e7-4613-9041-d57f34858323/jajeburixanobotut.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_off0000e5c4.bin
b97c6ba0e22acc807cb9e80a102ba6c7eeab751e548fec915c87bf816dfc9ff0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 5660 bytes
font_01_sfnt_off0000f922.bin
6a8f27ef876d32dace99f984b6a8d835d1393694134b43d15af49132eda38904
pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 11016 bytes