Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0aa2fa6b6258bbe…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 07:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f3fc13f688b64d0b66ae6ba79e7c1fdd SHA-1: f8ed400119496c299182b5d3d1e55c31670471cc SHA-256: c0aa2fa6b6258bbe4bc7ea1229583876d84e80ce092db6e0675ac0b3aef4dd60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://crysiq.ru/uplcv?utm_term=honeywell+optima+plus+gas+detector+manual PDF link annotation
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/a6476e1582cee2742feed89d363e2bb5/garalif.pdfIn PDF document text
    • http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/47990687988.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/dd1oq8bhbtan6ud82db5p6dqu2/56593489685.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/slvmgmk4q4kb7fl2tv52een3s7/kagefitunolakonegumuva.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/deribuse.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/gogevewavi.pdfIn PDF document text
    • https://mattress-leader.com/media/38701695082.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/nukamosotosipigivapo.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c652dcf036e---fiwomigalududozi.pdfIn PDF document text
    • http://kahasat.cz/data/file/goguvowoxeruxej.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/tesodigufomadobitonoka.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/79076136910.pdfIn PDF document text
    • http://sb-78.ru/files/file/liwejarizobetoziv.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/18d9080bd0863990838c174ff58a6231/86873757649.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/29792404632.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/3245c175f588065a0d325d76e3662115/xetowu.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/denepa.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c258fc4625---36463736134.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b82f45faf---verakiduzo.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/20266726756.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d265aa2d8---71028884253.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/17894894363.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/93bf44b785171c0adbab50be706bed43/baluridinadalilesetatid.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607717c3dd353---zedidevobisafesusitikov.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD9 11148 bytes
SHA-256: 1f474c2494b2e9c38e697ce6f624fa233ebcaf26e1bd1fd1de814b5e86950159
font_02_sfnt_off000114ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AE 19008 bytes
SHA-256: f960cf82124e9dd7e0b9eeaedb7aad87ce91c15d9bec8f37b85d241e830dff74

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