Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96bdab3d712f712…

MALICIOUS

PDF

67.5 KB Created: 2020-11-13 05:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c63965b6ba40303ca4315f83d328879 SHA-1: 534d737772b5f75c740238fad9ff206ad7cdc9d9 SHA-256: f96bdab3d712f712523a53bc22b53012de193bb4e3187aa913a250ef70042864
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The embedded URL, 'https://traffine.ru/aws?utm_term=recommendation+letter+for+college+format', suggests a social engineering lure related to college recommendations. Although no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs indicate a phishing attempt, likely leveraging a PDF exploit or social engineering to redirect the user to the malicious site.

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://traffine.ru/aws?utm_term=recommendation+letter+for+college+format
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5f90ab20631c0.pdf
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5f8b99c3c3922.pdf
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f93f09dd6b41.pdf
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f8aaf45031b5.pdf
    • https://cdn-cms.f-static.net/uploads/4474218/normal_5fa8a65f697b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/688d1bc3-f5df-40e8-847e-48f802c8714d/ancient_greek_entertainment_facts.pdf
    • https://s3.amazonaws.com/sedimeraxufi/niv_1984_bible_free_download.pdf
    • https://uploads.strikinglycdn.com/files/00821c49-5d99-473c-a795-2067a6c6dc4d/dark_elf_noble.pdf
    • https://uploads.strikinglycdn.com/files/b5604e6c-6d69-4dda-8d77-b2d44cfe2e99/words_starting_and_ending_with_same_letter.pdf
    • https://uploads.strikinglycdn.com/files/989c1527-400c-42f9-ba71-9483d04f544c/como_redactar_un_objetivo_ejemplos.pdf
    • https://uploads.strikinglycdn.com/files/cec62dd5-f9eb-43cc-91bf-5074f7b811cf/pijuwisomupijanugoxit.pdf
    • https://s3.amazonaws.com/xedewofuretujo/the_burn_tanking_guide_ffxiv.pdf
    • https://uploads.strikinglycdn.com/files/f89aad16-0081-429f-814e-de17e538ce4c/fubuxusituvotop.pdf
    • https://uploads.strikinglycdn.com/files/ed9169c8-ca5f-43d2-926e-4c00163a895a/xobalolenowaw.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_off0000cde3.bin
97a49f0c2877917c29dddc2f331bb2d8fdb02411bdfd036e51f659e3874215c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE3 5172 bytes
font_01_sfnt_off0000df67.bin
bfcfffda6aaddc4fc94dd09046a13abc9e6968e31d8f26c3d4f934c84f44417e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF67 9972 bytes