Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a13141534c39d02…

MALICIOUS

PDF

79.6 KB Created: 2021-03-29 07:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2bea377356ed5788d2cf8fcb39ff1669 SHA-1: cc97b0a78a63f9d877c8ed103fcc7f9c49b31309 SHA-256: 9a13141534c39d02dbd5a6a20079136c1fd3b0c9ca26ac58930f7e61c4d766c4
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, disguised with a seemingly innocuous query parameter. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URI are sufficient indicators of a phishing attack.

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://xezojetit.ru/strik?utm_term=how+to+solve+a+3x3+rubik%2527s+cube+steps PDF link annotation
    • https://cdn.sqhk.co/ranetixeba/dVigiiH/67283632410.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/iVhjjcn/warhammer_underworlds_shadespire_card_list.pdfIn PDF document text
    • http://zodusen.22web.org/44161728303.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://womutefipile.epizy.com/tiximetuvaxodefawofuki.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/av_malformation_mri_protocol.pdfIn PDF document text
    • http://junikul.epizy.com/lukiwaxikivuwofogixil.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/maytag_neptune_tl_washer_manual.pdfIn PDF document text
    • http://biduxejuvelofe.rf.gd/hand_sewing_stitches_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/turejilupunur.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/daihatsu_rocky_f78_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/mevuwenafikuguditot.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/dafapisaki.pdfIn PDF document text
    • http://waboxizolomove.rf.gd/76977144094.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/assets_android_developer.pdfIn PDF document text
    • http://goludoden.rf.gd/pidawesizik.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/kathi_sandai_full_movie_in_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/birixiwokugikusoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/mental_health_diagnosis.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/the_microbiome_solution_a_radical_new_way_to_heal_your_body_from_the_inside_out.pdfIn PDF document text
    • http://gagujejadozudor.rf.gd/67532584611.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 5508 bytes
SHA-256: 53df56b6615ec7e38216e48e97f7841fb91be9f83dc081d06465b9a4dcb72bfd
font_01_sfnt_off00010acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACB 11264 bytes
SHA-256: 1962fdab9c3a4b01d117feabd31c700e3a204e2ba4f80061c9fb015a9e45493c

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