Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff83d8e61919ecb…

MALICIOUS

PDF

76.7 KB Created: 2021-09-12 22:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5775aaf75de3d84be1947cdc94fb0800 SHA-1: 3b200cf7eb623b1482f93754cc0d6e9461cce777 SHA-256: 3ff83d8e61919ecbda772b5291476d1be77d09db20a9618c4416f276db4499cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with numerous external URIs pointing to potentially compromised or disposable hosting sites. The presence of a URL with a 'utm_term' parameter suggests an attempt to track user engagement with potentially malicious content, likely a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://allytemp.ru/uplcv?utm_term=extreme+car+driving+simulator+hack+apk+2018 PDF link annotation
    • http://thegioituigiay.net/uploads/files/tekubukojopire.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/5442588946.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/11072007425.pdfIn PDF document text
    • http://vibrator4you.cz/UserFiles/File/ranof.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4692f25e7---xuvitilar.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/79811099876.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/5050063755.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/jomigi.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/74400818219.pdfIn PDF document text
    • http://dakmet.pl/upload/jarozoxeviwo.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/sifodo.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0748b6324---53558771793.pdfIn PDF document text
    • https://km2804.com/ckupload/files/58124467730.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f04b79b81---satorovipine.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/rabovoso.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/surejozureja.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/7gf0qoqvq54equruus2uqq04t6/jimilirutugoxatikadud.pdfIn PDF document text
    • http://leguido.net/files/75019714815.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/bafoxiseda.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/99544412520.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/20065277814.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/lelejilesifapot.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/85370569596.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161390edf3fdbb---viduseb.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/30902267488.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_off0000c0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD907 11808 bytes
SHA-256: 54d6dfa8443da941f6728bd464d4dc81dfe78f9d63e2e88d8022e92f687fa3f0
font_02_sfnt_off0000f4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F5 17608 bytes
SHA-256: ce1a6c41458d48b29fd470cb3e599b6bb41096fd20a29f4adc4a0b0074e465d4

Open this report in the interactive analyzer, or submit your own file for analysis.