Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c40399db2925b6e…

MALICIOUS

PDF

82.1 KB Created: 2021-03-29 01:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45bb0e05ce8a0a1c1cabee1159549f51 SHA-1: d81c2724ecaa3548491cef12f4ea6bd44288b243 SHA-256: 0c40399db2925b6eb07ee0f78ae3fc4bc7cfac23427e9566cf25993888757369
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to a 'Cuisinart toaster manual'. The PDF contains a large number of external links, with a critical heuristic identifying a link farm, suggesting the primary purpose is to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=cuisinart+toaster+manual
    • https://cdn.sqhk.co/dixufeja/j57jdge/17839416583.pdf
    • http://ruzopiter.iblogger.org/illinois_vsd_190_download.pdf
    • http://wabaxifejem.sportsontheweb.net/anemias_hemoliticas_inmunes.pdf
    • https://cdn.sqhk.co/matezafun/ifHiihj/forward_financial_bank_marshfield_wisconsin.pdf
    • https://cdn.sqhk.co/sikereri/gfihhiT/goodnotes_bullet_journal_templates.pdf
    • https://cdn.sqhk.co/duditizonut/ahbhvji/tamewigaxupa.pdf
    • https://cdn.sqhk.co/vulovosovem/hiQ0a3w/semavawuwewi.pdf
    • https://cdn.sqhk.co/xegunorasu/jbidcjq/gejogutulifomuvumeg.pdf
    • https://sabovewedasujak.weebly.com/uploads/1/3/4/4/134493104/xivirafofaz.pdf
    • https://cdn.sqhk.co/nejisakatok/bjfNPFz/sevasegaxemuf.pdf
    • http://rabiwitijif.medianewsonline.com/btec_national_engineering_book.pdf
    • https://cdn.sqhk.co/fuzokikili/RehsijN/50872899102.pdf
    • https://sesupukaxupasi.weebly.com/uploads/1/3/1/0/131070911/goguvojil-jereru-remupoluf-jidese.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nijarigu.onlinewebshop.net/duzolovoparapipolu.pdf
    • http://fivamoxopel.epizy.com/8988233224.pdf
    • https://s3.amazonaws.com/gofiguj/how_to_change_the_drive_belt_on_a_toro_personal_pace_mower.pdf
    • https://s3.amazonaws.com/telasebisu/9615362845.pdf
    • http://dudisij.epizy.com/john_deere_js40_owners_manual.pdf
    • https://s3.amazonaws.com/nupotukig/bijective_linear_transformation.pdf
    • http://fuluxewamotate.atwebpages.com/29277238407.pdf
    • https://s3.amazonaws.com/sitozi/dimipanoviwesowiwife.pdf
    • http://magegefopo.atwebpages.com/the_travels_of_ibn_battuta_quotes.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_off0000f8a1.bin
a4d7c0aa76d17a75e077fa3fa944b19656a05180a30269c82a087a88157ebf4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 4736 bytes
font_01_sfnt_off00010899.bin
80e45734622646cb770679ce194bca12bb0b7180973b8caa940823ad59ee0f1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10899 10744 bytes
font_02_sfnt_off00012d21.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D21 4324 bytes

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