Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae6011442ccaccc…

MALICIOUS

PDF

83.2 KB Created: 2021-09-17 20:37:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 77335b9fe9ea4dd1cb29115e3d9cd58d SHA-1: ea819e0a0207e22cc613a712a4626be5136d9808 SHA-256: 0ae6011442ccacccea77868750a461ecba243fdfd0a8a1a67870333c3071a14c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection (Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0) and an ML classifier with a high score. The file contains numerous external URIs and link farms pointing to potentially compromised websites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/uplcv?utm_term=talkatone+plus+cracked+apk PDF link annotation
    • http://abwninemile.com/uploads/files/najubipivimu.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/folukorajopugejamep.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/4e2c507b6e7cb38ae4faf6669443dd1c/89942059218.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/katazosulo.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/53952578952.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/noraxenafowurazid.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/064c8672e3160c203c755d936ed1d0e7/72144358985.pdfIn PDF document text
    • http://precisao.org/files/files/74400175778.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/31326152388.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/47066454102.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/49027061501.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/46169870901.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/10052929407.pdfIn PDF document text
    • https://2winit.com/Files/files/14816390355.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/pilotegijawideveguteduwu.pdfIn PDF document text
    • https://brs.jo/userfiles/files/22048162453.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/waxijetapebexagakusefu.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/83059875032.pdfIn PDF document text
    • https://venus-forever.com/image/files/xotukavisavanuxobefopil.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/ues3p2frvv9h0egngomnvl8e8j/15197922021.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/fejeboke.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/koxiz.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/54193179666.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16141fb1677427---wovawejamiwivijupiwevapu.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_off0000de02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE02 10572 bytes
SHA-256: f7453dc2499e0ec3c3afb1e9f3d7f078fc2c0be8c5d9703d55764cdc0830ebbf
font_01_sfnt_off0000f64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64F 18240 bytes
SHA-256: d299b6828e39f1d0957bacbcb1d0535e223969dcfb5a19475e5fbd27fa16d12d
font_02_sfnt_off000125c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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