Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9e764bbf407d54…

MALICIOUS

PDF

86.3 KB Created: 2020-12-19 06:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: af8430a871a290e1e048173207b59e24 SHA-1: 2079ffbf054c4b1da0927271a3666f7bc856e71a SHA-256: 9e9e764bbf407d548bf7655e4ff13c3b9c5fb129a5b4a853e6efeca004a56abf
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing page or malware. The document body, though heavily obfuscated, suggests a lure related to 'linguistic relativity hypothesis'. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://trafficel.ru/strik?utm_term=linguistic+relativity+hypothesis+mcat PDF link annotation
    • https://deluneruniji.weebly.com/uploads/1/3/4/0/134012649/2562010.pdfIn PDF document text
    • https://sepafolelobonel.weebly.com/uploads/1/3/4/6/134614676/84e626.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/karararobo_nujolekoririb_wagupifilam.pdfIn PDF document text
    • https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/konirakikoparuxuwen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2e03b1c8c7413143ed9a1/t/5fc89810a9f67830caff1994/1606981648446/roman_empire_rise_of_rome_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/84400235016.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc542ce9698b02c7f3d61af/t/5fc814a3d6e0cc37e32e3a71/1606948004450/hello_neighbor_switch_walkthrough_act_3.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/52348080664.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9faf0a190b16b315c206/t/5fdcc4b08eacc47ac4ac271e/1608303793929/9257805538.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/airport_departure_board_template_after_effects.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10969 5448 bytes
SHA-256: a6290e087dc09aa1e0a44c490dd42a8b20590ca7a1613aff9208375253e83a6e
font_01_sfnt_off00011be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE4 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00012747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12747 10904 bytes
SHA-256: ce1b5939696083566bf89f703dc14b10c8ca33228189bff8d650cdaf17daf360

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