Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccae12dc385b6821…

MALICIOUS

PDF

90.0 KB Created: 2021-03-18 05:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f58c5940eddde8bb25767f31b61acbab SHA-1: 5b3a92238141254a7d4270b78e86df9bff49c79e SHA-256: ccae12dc385b6821c095abd95096e9167e36939d0fc38175288ff133a8db2378
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/award?keyword=democracia+e+liberalismo+pdf PDF link annotation
    • http://jelusuvobirolen.mywebcommunity.org/12097134821.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/91557987241.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/0G5H8DK/39039050384.pdfIn PDF document text
    • https://cdn.sqhk.co/zitiwofiru/jjcmtYb/crowd_run_3d_popular_crowd_city_warriors.pdfIn PDF document text
    • https://cdn.sqhk.co/vukebomuwan/nvgcPbM/vorotizomolid.pdfIn PDF document text
    • https://nabebumiz.weebly.com/uploads/1/3/1/4/131452902/bubifomapon-tifalesageduzen.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/sda_twi_hymnal.pdfIn PDF document text
    • https://fumabufoduf.weebly.com/uploads/1/3/5/3/135313851/gixetum_tutow_borakebijon_danojemo.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/Kfhbgcy/tank_battle_free_no_ads_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/cQhghbM/94279581456.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zidenigad/48524885714.pdfIn PDF document text
    • http://mutifitiwexo.epizy.com/78681692472.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/convert_to_word_acrobat_dc.pdfIn PDF document text
    • http://kuwajakuxoj.epizy.com/jack_lalanne_fusion_juicer_stopped_working.pdfIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_567d070d6308419e951b2bb6efe190d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/53798259489.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/rogers_anyplace_tv.pdfIn PDF document text
    • http://jadivepijuga.myartsonline.com/68429318653.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/bully_anniversary_edition_revdl.pdfIn PDF document text
    • http://lulevewutowa.epizy.com/travel_agency_business_plan_philippines.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/what_does_the_stimulus_check_look_like_on_bank_statement.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_3a5225530bfe431a84072a88c4f266a3.pdf?index=trueIn 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_off00011af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF3 5440 bytes
SHA-256: 4c4be245561516ff480c1fd4a81ddf2bff017f4977c83d1c3f59da16cfcfc895
font_01_sfnt_off00012d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D53 14740 bytes
SHA-256: 33419af5ad8ac63b7b279f5e6f974b6192bbe93d33e58ba8582976c4adadedb4

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