Malicious PDF — malware analysis report

Static analysis result for SHA-256 b256f2868fc9ce7d…

MALICIOUS

PDF

67.6 KB Created: 2021-05-28 22:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d211ed16ed0c389cdae3245b4067b74 SHA-1: dcc7162cfc6ab7f33500126bf2319fce89c29aaa SHA-256: b256f2868fc9ce7dfb3ca2a868504d293c8f07c88ef3874ef4070a4b01f803ab
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for further exploitation.

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://jacksth.ru/strik?utm_term=arlo+smart+home+security+camera+system+manual
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/01bc0.pdf
    • https://cdn-cms.f-static.net/uploads/4403534/normal_605414574a987.pdf
    • https://ronizozobofer.weebly.com/uploads/1/3/4/6/134654069/4936373.pdf
    • https://dadomirizetuso.weebly.com/uploads/1/3/4/8/134870225/xudaguxix.pdf
    • https://bipakevulof.weebly.com/uploads/1/3/4/6/134602937/zilev.pdf
    • https://saxunerafoku.weebly.com/uploads/1/3/5/3/135312656/d1266.pdf
    • https://cdn-cms.f-static.net/uploads/4369174/normal_606b8065506c5.pdf
    • https://bunonosuvon.weebly.com/uploads/1/3/5/9/135976801/6159238.pdf
    • https://litusavetedi.weebly.com/uploads/1/3/4/4/134445261/kurozuxebazawagutotu.pdf
    • https://vurejubi.weebly.com/uploads/1/3/1/4/131454114/6508188.pdf
    • https://gedejapel.weebly.com/uploads/1/3/4/3/134314995/xijefawiregizogedam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0edc63c5-a20d-4ab8-825c-2b0fa1f5497d/how_to_reset_the_motorola_phone.pdf
    • https://uploads.strikinglycdn.com/files/7f2e10a8-208c-4a7b-8958-23222c4f36ad/what_is_the_proofreading_mark_for_capitalization.pdf
    • https://uploads.strikinglycdn.com/files/83704e0f-1b03-4b0b-9c9a-19202aaa5fd1/56804842343.pdf
    • https://uploads.strikinglycdn.com/files/6a54770c-312c-4805-93cd-0789c6c32e9e/90080258525.pdf
    • https://uploads.strikinglycdn.com/files/815d1a56-ec21-4ca4-8644-fc1593bb2d86/sifulukovapogigasozi.pdf
    • https://uploads.strikinglycdn.com/files/3f1ee647-02a5-4ba4-abc4-299b18772f92/how_to_make_a_simple_rainbow_loom_bracelet_with_your_hands.pdf
    • https://uploads.strikinglycdn.com/files/d595deea-3653-4962-abde-af9fcbcdedb0/zotufav.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_off0000ca57.bin
11b298ae2322a4065959f01589c994039f2ca84d87213a9bbc3876aa8830506e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA57 5132 bytes
font_01_sfnt_off0000dba1.bin
725e36a7ff4d1976e3b5738a9f4735a0164575f8e5cdd2146b25c993f8862692
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA1 10516 bytes