Malicious PDF — malware analysis report

Static analysis result for SHA-256 0751f48b827142ab…

MALICIOUS

PDF

68.8 KB Created: 2021-09-28 14:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fd22a974292fadf455e2ea5370efcf67 SHA-1: e8efcdbca6b10220dd49a28427a7fbf5759f911f SHA-256: 0751f48b827142ab16c769bfd292092e4cae5f0d9735d890bdc1ce4f8e080f59
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking embedded links, which are numerous and point to various domains, some appearing to be compromised CMS uploads. The primary lure appears to be related to 'adobe lightroom hack version'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://smidgel.ru/uplcv?utm_term=adobe+lightroom+hack+version PDF link annotation
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/vamolesapufuraxenelokanop.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/bibina.pdfIn PDF document text
    • http://e-hematologica.pl/users/file/guwusezasofuwizaganagevap.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/44466795669.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ee920efdc65747937fa45afe359551e9/69269794129.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/161342169adcb9---vizunatabinuvuji.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/silusitiribubiv.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/5323724081.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/muzeri.pdfIn PDF document text
    • https://htchninc.com/d/files/wudazakurupadumorovimaru.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/20029784307.pdfIn PDF document text
    • http://4darchitecture.org/img/all/bexagagiravowovovu.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/nilavuxaxogumurodisuzopag.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/71018274963.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16146b293eef26---26002069898.pdfIn PDF document text
    • https://medpressa.ru/files/file/sinesedutoxobixasigijalof.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/rotojojepenaliwutedane.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/15253083062.pdfIn PDF document text
    • https://birotex.rs/images/files/84345630999.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/7342034648.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/52797205094.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5sm6mg3voel7b5njn5bmfodbd7/fijubariwenoze.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/50591161649.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_off0000af26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF26 14608 bytes
SHA-256: cd235e4cd43a5a8474d45d610906bf15e05a0a4ef7f8e207b9c6cebbf84e0f29
font_01_sfnt_off0000d40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40B 11096 bytes
SHA-256: 1cb365dbd8efaf4248ea86176db4799d59fb9f860189d26bdf74b7b2e2b40f70
font_02_sfnt_off0000ed92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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