Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8131e03019edae…

MALICIOUS

PDF

76.2 KB Created: 2021-09-10 06:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ed51b1f78392bfd7a8d89323cb0dc736 SHA-1: 4adfa64b33ecb098ac2ec51b825146a3e4cfd4aa SHA-256: 4e8131e03019edae23a4589a3ebbbaf80c31ff9b2db1183278f43864e5492eea
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links to compromised websites, indicating an attempt to deliver a malicious payload. The presence of a visual download button further supports a phishing or social engineering lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=find+gps+on+my+phone PDF link annotation
    • http://sadiqandsons.com/userfiles/files/47956774973.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/venajiximutaz.pdfIn PDF document text
    • http://ropesadventure.com/d/files/voxomokizajekibijajided.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/85815f3596f42ec016cbf653214d7aa8/2846421883.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613472a2227dc---96574405156.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/99761232217.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/pefirejejilafox.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/27247226182.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/4ef7408696ba037b7396ae3432641099/63823441844.pdfIn PDF document text
    • https://j26clean.com/upload/files/ratemoxuzaxef.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/jovudovuxinotawowu.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/2449740165.pdfIn PDF document text
    • https://salwangurugram.com/files/sufekeguredaluze.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/darubenolulimon.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/gizasaroxiguruxakatefegox.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/u0ep74hbi7904claaih6nbr5u2/42972982139.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/19990765701.pdfIn PDF document text
    • http://astprom.ru/sites/default/files/file/30736571402.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/9676776028.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309a3125917---13316008194.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/mujuluniselotuxonufit.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/79053309944.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/davapinupibojugidofu.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/sunepife.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_off0000c865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC865 10524 bytes
SHA-256: 55caedef0b36151577c572da98ddaeab89bbb022731cb55a68abf8a554438c4d
font_01_sfnt_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F7 16752 bytes
SHA-256: f466263890b9c1648ff34c2690aa3ad176cb2a91e74b6697d73294703f13a344