Malicious PDF — malware analysis report

Static analysis result for SHA-256 373b735b1d93945f…

MALICIOUS

PDF

71.0 KB Created: 2020-12-22 04:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2625706a6e579cd04a12dc72f4027c52 SHA-1: 53107b4c3c951ad01fa45748bb4c7b1503035434 SHA-256: 373b735b1d93945feab1cefcb752a809599938a369bb95e14578d5408a772bb7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, masquerading as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI and the overall detection profile suggest a phishing lure.

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://traffnew.ru/strik?utm_term=nuts+and+bolts+store+near+me
    • https://cdn-cms.f-static.net/uploads/4411709/normal_5fab2fa7028a1.pdf
    • https://cdn-cms.f-static.net/uploads/4451555/normal_5fa4b9c00f3cf.pdf
    • https://cdn-cms.f-static.net/uploads/4461516/normal_5fd7d9d49ecdb.pdf
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5fca91e621319.pdf
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5f9b3013db2cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dufekifaral/civilization_5_guide_science_victory.pdf
    • https://uploads.strikinglycdn.com/files/037f0220-c153-4b72-b04b-6339dda1d39e/pusesugel.pdf
    • https://uploads.strikinglycdn.com/files/9038e671-dae9-4441-904c-8aad8b43a9f7/47691695787.pdf
    • https://uploads.strikinglycdn.com/files/be0f71aa-af2c-45a9-a089-7cf8d5f7d7d5/nawuxovujabowixali.pdf
    • https://s3.amazonaws.com/fedojigudaj/fivekukemos.pdf
    • https://s3.amazonaws.com/xapota/equivalent_ratios_worksheet.pdf
    • https://s3.amazonaws.com/teximikamukubo/nukijipegosojawanikemepe.pdf
    • https://s3.amazonaws.com/rokuwapesu/viewsonic_vx2433_wm.pdf
    • https://s3.amazonaws.com/viregujipowuru/zimeguxipivinobopifadinu.pdf
    • https://s3.amazonaws.com/zomuzigo/how_to_clean_a_taurus_g2c_9mm_pistol.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_off0000d972.bin
d3cc5dac04820c9480fd8ef957a568111b95dec793990c2d2bc078a839e7dbcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD972 5080 bytes
font_01_sfnt_off0000eaa0.bin
7d932757b50d2ff6a8c8c8139a4926dc75469fc5e6ea1953f8d4a64545070fe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 10788 bytes

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