Malicious PDF — malware analysis report

Static analysis result for SHA-256 6129d252ab3756ee…

MALICIOUS

PDF

76.8 KB Created: 2021-03-20 12:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f8ac25fe945e812707e2b4dfa282079 SHA-1: b678f7984e4e204f6b013e452855e9c02c97a594 SHA-256: 6129d252ab3756ee7acfb40917d18cb7ac3627b40dd2aa6a321363c97978f6c9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on Weebly and other dynamic DNS services, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of external URIs points towards an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ponafet.ru/award?keyword=asterix+and+obelix+s+birthday+pdf
    • https://tigerabedudutid.weebly.com/uploads/1/3/5/3/135304069/5429972.pdf
    • https://wozagasogudizi.weebly.com/uploads/1/3/2/6/132682295/8f29a62c10.pdf
    • http://takipibimaxubov.sportsontheweb.net/astm_a53_free_download.pdf
    • http://momarivido.mypressonline.com/what_ink_does_hp_8620_use.pdf
    • http://lp-consalt.ru/lolumowadugibeditutevevupfvbj.pdf
    • http://pay-order.info/rakuxizasijokij8nzx.pdf
    • http://m-ryanaf.site/85261250026qtgv4.pdf
    • http://copyright-help-report.com/star_trek_discovery_season_1_episode_5_cast1ra4l.pdf
    • http://sdfsdfsdf.shaketorch.com/42146692048.pdf
    • http://axacheat4.xyz/6628252868a11ck.pdf
    • https://kevanosum.weebly.com/uploads/1/3/0/9/130968994/wuwiwodu.pdf
    • http://zagavogafewakud.iblogger.org/zumeroxujumakajote.pdf
    • http://nujagexurej.medianewsonline.com/how_to_make_a_study_guide_for_chemistry.pdf
    • https://butapakenora.weebly.com/uploads/1/3/1/8/131871909/5193210.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/eb01b768-8554-4641-9e29-bc3370efc662/is_elizabeth_is_missing_a_true_story.pdf
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_844ff2bbf058473997b53ec748efdc3e.pdf?index=true
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_712b5b4304fb4a6092fd664f189a37b1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9f541053-2319-4274-9d6f-b28942ee54ae/what_is_computer_ki_definition.pdf
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_4e7d6a79af0744a7b7abcd687b76f0fe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b0ef16de-bded-43e8-8f65-2e49f0a0756d/togubepezezejekajalaso.pdf
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_a3573d9fdd0e46d7abb110ba9f510030.pdf?index=true
    • http://fijinibegomiba.rf.gd/nukigotofobikotekiragex.pdf
    • https://uploads.strikinglycdn.com/files/5b51150b-1683-454b-b336-0bad254105c4/pros_and_cons_of_using_ipads_in_the_classroom.pdf
    • https://uploads.strikinglycdn.com/files/758ee625-0c0f-4716-a550-cdc77b4d2997/coleman_rv_air_conditioner_customer_service.pdf
    • http://kemesuxaw.myartsonline.com/lonely_planet_ebook_usa_planning_map.pdf
    • http://derasuloti.rf.gd/kawofufafatabokej.pdf
    • http://vuxupib.epizy.com/pirates_of_the_caribbean_violin_sheet_music_musescore.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_off0000eeec.bin
d720165edba727734336191c69bd1b8069b5967947406fa77442b5c58b6836c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 5428 bytes
font_01_sfnt_off0001015f.bin
2e1e5dcbc52c18822af71d621c28af888f9b18b25411638c453f18c4a2984aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1015F 10612 bytes

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