Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b68c54aecad1281…

MALICIOUS

PDF

70.0 KB Created: 2021-04-05 10:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95e41afbeea2bc3904c9d983c04d01f4 SHA-1: 705f0508eea38dcafc2611c9562f26e032a02224 SHA-256: 9b68c54aecad128144b6d75b3d929b47acaf892a3cc02033838991bcc452aff1
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with a significant number pointing to potentially malicious domains, suggesting a link farm or phishing campaign. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/wix?keyword=bi+ground+state+electron+configuration
    • http://wixibamepas.22web.org/safifirorubugumenimolin.pdf
    • https://cdn.sqhk.co/gesaxamadew/Zgcqqie/football_player_stats_spreadsheet_template.pdf
    • https://sexewowoko.weebly.com/uploads/1/3/0/8/130873923/07dfd45478b.pdf
    • http://subejewumo.scienceontheweb.net/xenoromagetitasowip.pdf
    • https://zesuloni.weebly.com/uploads/1/3/4/8/134892945/betikugip_bavox.pdf
    • http://janorewaxeno.mygamesonline.org/canon_in_d_piano_violin.pdf
    • https://cdn.sqhk.co/zadoweferoxe/miihehf/13434250261.pdf
    • https://cdn.sqhk.co/rojarimeg/hd6iigc/kinesamerukimedesisafe.pdf
    • https://cdn.sqhk.co/kevamubeminu/dglrjlU/paladone_miniature_tabletop_ice_hockey_game.pdf
    • http://momelekunizu.22web.org/how_to_do_the_shadow_possession_jutsu.pdf
    • https://dovenokitumenu.weebly.com/uploads/1/3/1/4/131482991/6bdf9.pdf
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/9845058.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://rijogutigoxek.epizy.com/b._com_3rd_sem_syllabus.pdf
    • https://uploads.strikinglycdn.com/files/4fbbd51a-e529-4c8a-8401-d8db1a9cac44/how_to_repair_your_body_after_smoking.pdf
    • https://uploads.strikinglycdn.com/files/359b328f-f1e9-4311-b503-16eaa19c904d/6517438710.pdf
    • http://tekubone.epizy.com/producer_to_producer_2nd_edition.pdf
    • https://uploads.strikinglycdn.com/files/1c232501-2362-4acb-bbc1-fedea94e5dee/72389251132.pdf
    • https://uploads.strikinglycdn.com/files/3a97df92-e789-44a9-bb0b-d3a115f1b5de/what_was_the_causes_of_absolute_monarchy.pdf
    • https://uploads.strikinglycdn.com/files/d551fe75-fdd5-4c3a-9123-d1f25951c6ee/sifezejozirugazeraf.pdf
    • https://uploads.strikinglycdn.com/files/2a3949de-e0f6-409e-a931-daaf788ccd5b/nakawuzuruni.pdf
    • https://uploads.strikinglycdn.com/files/ddffca10-0fe4-4dbc-9571-4926be1951ed/how_to_convert_graco_3_in_1_crib_to_toddler_bed.pdf
    • https://uploads.strikinglycdn.com/files/29838b67-444d-49cf-852b-a7d1da682be4/how_to_edit_mp4_video_in_blender.pdf
    • https://uploads.strikinglycdn.com/files/5d0c3f55-51c0-4e06-a289-5430ef1e18ac/simplified_fg_knot_animated.pdf
    • http://defakulid.atwebpages.com/aplikasi_convert_to_word_untuk_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca88.bin
bb8a241c0d542b1055f93f97c147b7f7b3b15cddbc84079307272733500111a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA88 5120 bytes
font_01_sfnt_off0000dbfc.bin
a09bb62fbb7c12f1b078ce02c05b045ebcdda7f9c09c6c7489c55eb6d03c1bc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFC 9412 bytes
font_02_sfnt_off0000fc3c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3C 4324 bytes

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