Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e772f3f44cd7877…

MALICIOUS

PDF

67.0 KB Created: 2020-11-18 07:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f09fba8fecdc6c59280e77ab399813a6 SHA-1: 5a26a83144422f631b4920751fd91f9daa0378c2 SHA-256: 6e772f3f44cd78777864ca3631198a530d579f9f96bf667a2b74a2396f7b2d00
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, appears to reference a PDF title, suggesting a lure for a document download.

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://trafffe.ru/strik?utm_term=reading+rhetorically+4th+edition+pdf
    • https://cdn-cms.f-static.net/uploads/4464070/normal_5fb42efd23cf8.pdf
    • https://cdn-cms.f-static.net/uploads/4379374/normal_5f91132fcb164.pdf
    • https://roderisagewap.weebly.com/uploads/1/3/4/5/134507489/gujenetepuwakigulun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tujeviwakirawu/6308623372.pdf
    • https://uploads.strikinglycdn.com/files/0c0737fc-43a7-41be-b9e1-1bd806334b3a/16931062112.pdf
    • https://uploads.strikinglycdn.com/files/1ac39343-dd42-4c0b-9ce6-235de8f4b21b/jeluzaribaj.pdf
    • https://s3.amazonaws.com/baxadelefofibuz/moto_x3m_3_unblocked_games_weebly.pdf
    • https://s3.amazonaws.com/fumiposamisur/wajabevi.pdf
    • https://uploads.strikinglycdn.com/files/348064d7-75a1-44cc-879c-07b7c6a5f257/who_is_max_s_mom_disney.pdf
    • https://s3.amazonaws.com/guvovigo/ophthalmic_instruments_and_their_uses.pdf
    • https://uploads.strikinglycdn.com/files/8c573bc6-da5e-4b92-85bc-76a206b74d0b/51424138654.pdf
    • https://s3.amazonaws.com/baxadelefofibuz/20336815385.pdf
    • https://s3.amazonaws.com/vavapekadoliti/89993332833.pdf
    • https://s3.amazonaws.com/memul/ruzefapazubawuzi.pdf
    • https://uploads.strikinglycdn.com/files/a077093e-df2d-42cb-8b12-717d7052f643/avast_activation_code_2019_for_free.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_off0000c8a5.bin
e1caa73112f46b6ff9eea13babd77842aca1bf81d287c4a74042a1b69517ac5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A5 5436 bytes
font_01_sfnt_off0000db3c.bin
715abca48d7d91c2cf93cf6ef0899b57d0491bf680c5acffdff6eef01ae252f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3C 10608 bytes

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