Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0795d5c7dbbd245…

MALICIOUS

PDF

83.3 KB Created: 2021-08-25 13:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 65e1b0e4d50bf5eb25bd8b16748cfb37 SHA-1: bc60e05480f6500eb019609a38e0ea183fbcb037 SHA-256: a0795d5c7dbbd245d1122302f4e687b06dfb69f4ef9334148de7977447f87ecf
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple external URLs, many of which are hosted on compromised CMS platforms or disposable domains. The presence of numerous links, including one with a 'utm_term' parameter, suggests an attempt to drive traffic for phishing or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://pixomot.ru/uplcv?utm_term=contractor+and+subcontractor PDF link annotation
    • http://ohmytour.kr/FileData/ckfinder/files/20210627_2AFAF974244EADE7.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/31754253684.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4ee00be701---gazewufogexakoduka.pdfIn PDF document text
    • http://lawngo.net/fckfiles/27809128445.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/4a6e7a186671464d68f7aab66590509d/wemurat.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/db11da399d5aa93edccf4d6af038d3df/pinemidugazolovemelawoved.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/23ae64d0e80eefa7e102cbefbbe986d8/wevevopuwobetebono.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/68489091816.pdfIn PDF document text
    • http://strandedtattoo.net/file/69241828511.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d83856a84f---tiwurefoke.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/zifegi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad672a8dfe.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/seluweworo.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/52736960934.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a44dc4ac4---gilozopin.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d31e11814---wedemu.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/11182284543764ed8d8c14cc1b4bd3c9/munimemifagobolorinibi.pdfIn PDF document text
    • http://mhspartan79.com/clients/9/97/97d0d0788ec4d6723ba7be3cd58769e3/File/rudozojuvigijovosozadupij.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/49adcab9eb1dffc1ffcce704a28e15a9/67452506203.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ibugu765s2u8764087903u36ld/pafajipukuxenoli.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/xuniwutipogilarizomul.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c18014d790---xetirakagawemewobasezuwe.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_off0000e2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 10364 bytes
SHA-256: 7a7616ecb6542fb857a44f608b53c3b85b40d5b15913b2622171c371c21c97c7
font_01_sfnt_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 16856 bytes
SHA-256: 92f40aacc0fcf63ec635bf54134dff87e8565a53ab290ed1e5fe333b89adc5ac
font_02_sfnt_off00012681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12681 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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