Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74fb62ee53dbea0…

MALICIOUS

PDF

83.4 KB Created: 2021-09-01 00:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 660b7e97e0dd3ba6d7f37302efd19d0c SHA-1: e2f6393207d054d4709bc127a3d5aac911576aa4 SHA-256: c74fb62ee53dbea09e4e5d7386db3034ac7dab99d30388a244f84994cd034d54
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs, many hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution scheme. The document body is unreadable, but the heuristics indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/46f3f15213c109bf38eaf7c59307a3fe/54643736862.pdf In PDF document text
    • http://dagmare.de/userfiles/file/kalefasivexixebex.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/79381255129.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/jojedomakot.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c18d2540e8---xefeviwuxifavakiw.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074d63abdf74---12675870693.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/32708195780.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/80263451285.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/ae444387b33530287dd3708dde71a742/waxaxowijofuxerumogojaka.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/786da349967108563fdabad91ac0ad03/duriginakapamedi.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/77033274451.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/pepokewufokiduvukamag.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfce05c0d1e---fasel.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/30348212662.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/pdnej7u2o4vhub7461jkngdgi6/77293408001.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/4307494799.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/41986439270.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/e466fca584cfc554cbc8217839568a87/17118501700.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9108ee05c3---lebewugamozedo.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/kinukoletobonowikupet.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/s1fo8eff4rpdp8e5iuf8qnpqq5/taxisogudanopemubi.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/sonupo.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/95380291487.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=differentiate+between+sn1+and+sn2+reaction+mechanismPDF link annotation
    • 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_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 11096 bytes
SHA-256: a0470ed151d50ca8adf868ba29674d60e363ff68b36895991cf6f72dfd04c4e4
font_01_sfnt_off0000f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11210 17328 bytes
SHA-256: ee9e1daaee7adaaa810edf07d0fe7b9b09d93f735e0f11cf65c25e582ce4ab44

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