Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b06ddb32164629…

MALICIOUS

PDF

76.8 KB Created: 2021-05-16 20:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c2742c5761c5fad8d0936d933822e82 SHA-1: 1e6c887381212bebbb046504ee3a9ee9dd711885 SHA-256: 55b06ddb321646292f1bd7b7ea70de5f68f82f440fd0716f22585aa264b37246
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF 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 deliver a secondary payload or redirect the user. The document body, though heavily obfuscated, suggests a lure related to 'Muslim baby names pdf free 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://dafemum.ru/strik?utm_term=muslim+baby+names+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4380695/normal_6064b133cedd7.pdf
    • https://cdn-cms.f-static.net/uploads/4470553/normal_5feaf3080059a.pdf
    • http://powuvomewekuxeb.getenjoyment.net/tibozukipepoxudufaw.pdf
    • https://cdn-cms.f-static.net/uploads/4419828/normal_60125ee4aad6e.pdf
    • https://zedowegekinusil.weebly.com/uploads/1/3/3/9/133997302/1824848.pdf
    • https://roxomikanu.weebly.com/uploads/1/3/0/8/130873860/c0d4af.pdf
    • https://cdn-cms.f-static.net/uploads/4426280/normal_6052c6f3a61b3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xodolipifonabo.epizy.com/beowulf_holt_mcdougal.pdf
    • https://s3.amazonaws.com/wukevirenesu/how_to_set_time_on_woods_light_timer.pdf
    • https://s3.amazonaws.com/dakebesuvum/92961542686.pdf
    • http://kirebidinuj.rf.gd/epcrs_catalogue.pdf
    • https://uploads.strikinglycdn.com/files/89967350-80f7-4538-a76b-c208bc34c2a1/9959629456.pdf
    • https://uploads.strikinglycdn.com/files/909f487e-0238-495f-bc7f-1f796c046157/los_rios_de_color_purpura_2_1080p_latino.pdf
    • http://pilisabewagedix.epizy.com/leather_computer_bag_for_17_inch_laptop.pdf
    • http://nisetekotixob.myartsonline.com/ford_mustang_mach_1_price_philippines.pdf
    • https://s3.amazonaws.com/bezegoluzose/19908025365.pdf
    • https://uploads.strikinglycdn.com/files/8c215212-b040-4a5e-85cb-c916edb51125/26039797723.pdf
    • https://s3.amazonaws.com/rizijubovapuk/80453813100.pdf
    • http://fowakoleviwamop.onlinewebshop.net/37835528013.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_off0000eea0.bin
ac0dbd9038ef8c788bce7ef41448870e0231ede8f628821a9db2fac77bc8635a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 5524 bytes
font_01_sfnt_off0001016e.bin
16bec7d3bf799570f60ad1935c336748fbb8dfcab05a789b3ae1dd69ffb2ab4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 10772 bytes