Malicious PDF — malware analysis report

Static analysis result for SHA-256 417177bb9e410fab…

MALICIOUS

PDF

89.8 KB Created: 2021-07-03 08:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9071964a3aaadfef44da6c7902c6718e SHA-1: 1343020a983c09c084649a3c1a8aa2d986211044 SHA-256: 417177bb9e410fab3c685ca2ee22b28afc3bd5bc99bd79aaf60773d8a0f7a089
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The presence of a link farm on disposable hosting further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/8fe1b0981ba9a3dc4b04e6c960e0985b/remakadozenul.pdf
    • http://akcjonariusz.com/UserFiles/file/lezapikuxibamajobuk.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608171a2bcdbc---56289287564.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c31989e7062---tegasamebagurezezawus.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a54688c48b21856c4029880eb2510085/purorenaratexewalaxopota.pdf
    • https://djennebeads.com/nbloom/fckuploads/file/sagirusekon.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/u529v99iiriauqaaisfoaoai83/boxudulukubi.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a890c52f9a5---66675557585.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727f2aadf4a---rekigatonanitajonagit.pdf
    • http://teenaramainc.org/clients/875997/File/46352898375.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3211b20c8---77170482624.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5715f1978fbe88c6d8b768cf4d5c71da/65732385530.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/65adc57b17d03eeebf42011d187f80d0/redokerikelijigis.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a31f2e33a55---3939113300.pdf
    • http://prime-standard.com/piceditor/file/90556566083.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb8e7392f---51022894085.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/3e8215fcbcbb23d021a63f48b7ab0e78/78714016817.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b26fb8173---wikobofonesigukozari.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1cd0635ee---80905894830.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/m4k5cpc5lau8u47ei5peo8hm35/munafololovaxinu.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a24c4b083a9---najug.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/7f3741f7195f78bf13533faa8d554b54/kesulejanabuzuzum.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=exercise+thought+of+the+day
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac0.bin
7208202da2ebc7a77c9926f7b22cc5b45194fe8ce562c167ed41272cac3d0d37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 17736 bytes
font_01_sfnt_off00012770.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12770 16792 bytes
font_02_sfnt_off00013f87.bin
9789c0d52ba4ebd373ea81048ce4ba940c5baf9706f779d0c3d658e91965a2e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F87 10904 bytes

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