Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6fceb0008539c1…

MALICIOUS

PDF

85.9 KB Created: 2021-09-06 23:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 799317c1e35e2cde9f4c7b3f2dfa2c07 SHA-1: 9d58177cafe060e52306791127e7b1dfa82e6fe1 SHA-256: 7d6fceb0008539c109429df621932528aa6c1eb198f1bf83ab19e6cd17d3e6b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links pointing to compromised websites, suggesting it is used as a link farm to distribute phishing content or further malware. The presence of external URIs and link farms on disposable hosting indicates a deliberate effort to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://smidgel.ru/uplcv?utm_term=artikel+pendidikan+agama+islam+pdf PDF link annotation
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o746shnd4og2dgeh4scp8lkfr1/gagobadez.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b04e474afb---gaxiwupumolemase.pdfIn PDF document text
    • http://immopolignano.lu/images/difuladokufugivusamog.pdfIn PDF document text
    • http://reikihaus.com/clients/75291/File/69570028238.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/6j9tgp5i9dsks0i21n4jqb3ci5/17749478993.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/18134227674.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/vufelapakugagivow.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5f78afa4d---14541474883.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/98295914015.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/21434930190.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/budubir.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/wivatumot.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/88243586882.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/f2qis03vi2cln82kl8rsttgiin/sexoxulexijem.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/javunapagurama.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/mirefalefuke.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/77716fc2e0b2530685255573671c1663/zoraresofasesofi.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/7k542r4eej61354chn016ao31i/77504936898.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/84307556596.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/54669554407.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/po89k5qelkev5adstn7c9df3q7/jizavu.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b308786fe96---vegexelojobate.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/88631039209.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_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 10792 bytes
SHA-256: 36a09eeb6a44b05835d08b1808eae7c2ad06e1c6fd871ba965ad7edf53d28a70
font_01_sfnt_off000106b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECB 16776 bytes
SHA-256: a9e47238bdd6cbf8868b557e1a6f6f9c168df83b0fa25cb6f26f48520af09bc0

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