Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad92ff58c8c03fe…

MALICIOUS

PDF

71.3 KB Created: 2021-09-03 05:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9c354205be14f4f6794ad84abaa2b3eb SHA-1: 212172c364fd0a80d0f233ce391f1639275f2ffa SHA-256: aad92ff58c8c03fe7a34e8af6db6b15a4d462cafd2d5fb64b2163d0fb4ab0468
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=values+and+ethics+of+social+work+pdf PDF link annotation
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3982ca2ea---13393840532.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/00035aa7fb63d03d42744c9dda9cbc8c/91573843893.pdfIn PDF document text
    • http://honghuibio.com/d/files/pozizig.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/digomovab.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738baeee25d---37746775255.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/69agc6mfmllfc2m1ssjjecad6i/fuxazolomifike.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/kaxomivo.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/duwamesopelekulaxadixexuv.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/39293096690.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/1q1h9n3hvigmktagf09fbub1o4/40231309202.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/6in1mim96nvv71k340sau3cls7/gofamibibidibavavinulozo.pdfIn PDF document text
    • http://kidneytexas.org/clients/861060/File/jawajenugiravamakavi.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/sonezemubitujemu.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/f0b223b70628714edf857bda3a97e980/tefaxib.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/lokipeviram.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/16514110284.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160758924617bf---lowasejapazijozupaxix.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/47010493859.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/de3jq6opbbvt5uhc61h5okjrg6/narofulezatotopiw.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e61530d64---femirokaxadomomawivekilor.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/kkvm07rl174tkm4slvs2scj1a9/maripa.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/zawujomoz.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7947e1ac0b---nozesike.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/044b595ec47d0a7ba9675fab3484e29d/2223330389.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/zofamaxexozubazuxizeb.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_off0000b6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C2 10964 bytes
SHA-256: e167158530ba0c30a525a3388f98f77172c7bd0cb16b2feaf4a266b90500c7a9
font_01_sfnt_off0000d034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD034 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 15540 bytes
SHA-256: 35f71b8293c3a53402fcc37e925e438f1354d0d5c2d919c8be8f07c30c89ad82

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