Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f300cffac02fae5…

MALICIOUS

PDF

73.3 KB Created: 2021-01-03 14:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9cfd95a97bf8f48e267337605412430 SHA-1: 77214f26e7b69ca402fff2e791ad1ac2f2e13472 SHA-256: 1f300cffac02fae5c3af3b37afb78c8d34fb7d73a75167a1a763bc783dc48535
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to deliver a malicious payload or lead the user to a compromised resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=ff14+fastest+way+to+level
    • https://jawuzinirofona.weebly.com/uploads/1/3/4/8/134886132/2701963.pdf
    • https://cdn-cms.f-static.net/uploads/4379236/normal_5fbe7e6981d2b.pdf
    • https://cdn.sqhk.co/bofogarabu/jgfjeTq/vamekupekevepam.pdf
    • https://sawonelezaxiso.weebly.com/uploads/1/3/4/5/134588179/2985897.pdf
    • https://cdn.sqhk.co/zupodejadofe/ridijhe/flight_simulator_2020_ps4_release_date.pdf
    • https://papazutizo.weebly.com/uploads/1/3/4/4/134467207/184992.pdf
    • https://cdn-cms.f-static.net/uploads/4422180/normal_5fa17e12125cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dowesitobuga/38542017120.pdf
    • https://s3.amazonaws.com/tifuwuw/pse_firefox_2.pdf
    • https://s3.amazonaws.com/pazovugal/facebook_logo_svg.pdf
    • https://s3.amazonaws.com/tokit/present_continuous_tense_questions_and_answers.pdf
    • https://s3.amazonaws.com/xanebavifamopez/jarapemusukodigo.pdf
    • https://s3.amazonaws.com/jedobufudajewu/food_safety_guidelines_for_cancer_patients.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_off0000e3f6.bin
80c448c9589e33646768f208acba99ec52f4b224c031e466451dfb1344deaf5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F6 5012 bytes
font_01_sfnt_off0000f546.bin
b10051832a1cfa37c572dd37d541730b3bea7450e4f7b41bd7831e2fd41ec431		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 10412 bytes

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