Malicious PDF — malware analysis report

Static analysis result for SHA-256 778f80727f97a2ca…

MALICIOUS

PDF

89.6 KB Created: 2021-07-23 17:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a8839024a7b81aafad91e54e2e1f5c42 SHA-1: 177e3c45686b4240ee94fea97f6ff63bddd49c27 SHA-256: 778f80727f97a2caeec2a37b1f2718c9735cbd538470151c8ca6665600346c0b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress sites or other potentially untrustworthy domains. The primary goal appears to be directing users to external resources, potentially for phishing or SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

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 http://aiswaryamatrimonials.com/fck_uploads/file/jigetubijozituregowav.pdf In PDF document text
    • http://alexlunacoach.com/img/editor/file/90991704500.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b105cf428---gabusutuvegofunotu.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/25079217093.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cecb97ddb56---jasagoxuvux.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/kufanidedugu.pdfIn PDF document text
    • http://tele-video.ru/upload/files/26383073093.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-17/20210517160008149597.pdfIn PDF document text
    • https://trongtrucsolution.com/uploads/files/87919450680.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/nunisideb.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/94009307633.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1c62f36ea---totujatugudepufubaralul.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c1a39f00e---68616704715.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b3b647cd9---47132996743.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/19eb2f897f15a2856a379c45e8ef39a9/lopetizex.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ad075fa7dd4f89cd2e5bcbcdc17757d3/bamijagijukex.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f295617f5---tuderabim.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609da45123543---xiwaxedusab.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/kivitaruzub.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/70468166502.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d7a3ad2ca---11168580656.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///56988112996.pdfIn PDF document text
    • http://songiadabinhphuoc.com/upload/ck/files/2639082125.pdfIn PDF document text
    • https://tmtteks.com/files/26890931737.pdfIn PDF document text
    • http://terminsk.by/pics/files/nigabosofu.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/zenerorof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=juego+de+tabla+periodica+interactiva+aprender+jugandoPDF 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_off0000f9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 10948 bytes
SHA-256: c32cc06d5313b14d3401cf6d2ff6c2f96166e7755c8d0ec003d09b79f8b4b7e3
font_01_sfnt_off000112fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0D 17592 bytes
SHA-256: 6816e553d6c4da92a31d8d41c548367021fc93837b1ca1d62285de9ac8ef9bd7

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