Malicious PDF — malware analysis report

Static analysis result for SHA-256 894859d04700a358…

MALICIOUS

PDF

81.0 KB Created: 2021-09-12 02:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6b7d6204c9fe56d4d284690dedea34f2 SHA-1: 15a7d720ed259a01c6922754cb699c42db752a75 SHA-256: 894859d04700a35828f52154ac50660814ff0838164dade0ce7a62a034d8ca8d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains numerous embedded URLs pointing to external domains, many of which appear to be link farms or disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded content are consistent with attempts to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=yedu+chepala+katha+movie+online+free PDF link annotation
    • http://toyotarent.hk/FileData/ckfinder/files/20210903_0DABFC0FE234B4A4.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210905011708.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090901255973499.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/24053599242.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/71960412080.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/senowosujuzifaparebi.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/wefojoledemewi.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/22708130662.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/rorosuwoxawi.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/pifanewifog.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/76f686e6d2fc7cc11f61eb8ce1803b89/11666477831.pdfIn PDF document text
    • https://people11people.gr/uploads/File/31576204848.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/kibawokusakowafiz.pdfIn PDF document text
    • http://eichler-kammerer.de/ruligukimewefo.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/fasaposobifexawodolak.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/27699133425.pdfIn PDF document text
    • http://xenangheli.vn/public/files/56811999326.pdfIn PDF document text
    • http://rent-lease-no1.com/userfiles/file/20210909145241.pdfIn PDF document text
    • http://www.moyekolodin.com/files/65293412749.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/bemeti.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/fovasudijefi.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/83784293680.pdfIn PDF document text
    • http://yongqingtech.com/d/files/96394448630.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_off0000d7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F9 10960 bytes
SHA-256: 137be1f48217a716472cf3f14630862256f44ac3bad91273bb6ea32bb16a5d6b
font_01_sfnt_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10939 17476 bytes
SHA-256: 3299b3ac83adbe808fd4389bbb583485eddeb5cf0c62f357484dc79f95df3ff6

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