Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5e664deaa39c4a…

MALICIOUS

PDF

69.8 KB Created: 2021-09-02 02:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ca56cb33d8afe11884fe2de3e373f320 SHA-1: 0ebf2e590eaf6cd3386a692b3bf03e3310f76d15 SHA-256: 9d5e664deaa39c4a349dfe7101a5e415af2b2da0e5a7d066a4ac813e15f0e7a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=4+eggs+protein PDF link annotation
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9b7891311---11060382079.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/72928849830.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/enqqpkcf3rfjkjvlkm972fqub6/68417567348.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/dexanirinoxoxiriwuj.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1d5b6fdb4---renomi.pdfIn PDF document text
    • http://multifamilyfoundation.org/clients/3/38/38c33163524538bb895552046de0b362/File/rosoludiwatirenibotuwu.pdfIn PDF document text
    • http://hanleyresources.com/images/553638639.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160db0aef05eb5---vetozukunidaz.pdfIn PDF document text
    • https://hissekurban.com/resimler/files/vitabi.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105a8e3a6b99---sovowex.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/85b3c99f1ec351fac7b41f8d3aff646b/zagapetadaderinil.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/jewobujixov.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/xinosexukalubakelubezat.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/muxusubifoxewinireluj.pdfIn PDF document text
    • https://iiml-pgpsm.in/ckfinder/uploads/userfiles/files/40377161779.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/2643211fae873a08a195322efd95f8b6/20997869831.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/38163163178.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/82da1d53ffd713c28d803c9ecf3082f0/71340315715.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776c22c8a52---58336107267.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/32892129875.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/c24330376bcba2aa313ec514f30c8c2b/gudugepupiviletamopu.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16120571bd508e---jijil.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/986eef02f86eb67f5f935758488c5ba7/kuxawolemimabokilamefo.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_off0000b335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB335 10200 bytes
SHA-256: 3c9809e0a110eaac02a3030522a9d523a832746a50735684f55b3c45366b33cc
font_01_sfnt_off0000ca23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA23 15916 bytes
SHA-256: 27e266d075e6016e07c3ee1f40d316557a9756d2a6f3bd4bd79a33e5552d8c07
font_02_sfnt_off0000f08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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