Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd4d33604df53af…

MALICIOUS

PDF

69.9 KB Created: 2021-09-30 19:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f77ce1df0ff1748b5d150d45551f731d SHA-1: 48651a1d32095f71e5fb61a39a5494c024c95dcc SHA-256: 3fd4d33604df53af783e7c9c1dd28fffec43dc125da0f3b559841c7d9c52b836
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are structured as link farms pointing to other PDF files, suggesting a phishing or malware distribution scheme. The presence of a specific URL related to game downloads indicates a lure to entice users. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://smidgel.ru/uplcv?utm_term=pokemon+let%27s+go+pikachu+and+eevee+download+for+android PDF link annotation
    • http://finadev-groupe.com/userfiles/file/lebuxilidanuwobaraxijal.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/wilabaxofumavotiwiwugodo.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/64589407636.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/87341285380.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/xizasimosametejiramamiwi.pdfIn PDF document text
    • http://firsttimehomebuyerstudy.com/images/file/linekejekibakexox.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151555d7bf8b---85854953816.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/jekemefizisoxeleri.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/36472692265.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/80055834339.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/4986116312.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/32894723333.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/20419291310.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/pevutidorutekegejidagufi.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210911_185551.pdfIn PDF document text
    • https://dm288.rs/slicice/file/57262162194.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/26825002590.pdfIn PDF document text
    • http://exosushi.com/uploads/files/38732348414.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/17528135174.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/86221354783.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/14031359912.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/89737931697.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/74080035147.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_off0000b0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AC 14832 bytes
SHA-256: bd5326c3f50166e654f3250584d7d9b203e3f62124aae1fd9db1048a3bbd25de
font_01_sfnt_off0000d620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD620 11448 bytes
SHA-256: ce223a71d12a343df25731724e06962c064eccb5b6210bcdfb369dc2d92c403b
font_02_sfnt_off0000f0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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