Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e02997e5e38e369…

MALICIOUS

PDF

85.0 KB Created: 2021-09-05 16:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 90e22a2a52c09e174a5446232c5fbe68 SHA-1: 12e29e2a759efe1a25f2332b8a5cbc3b9c4bc624 SHA-256: 5e02997e5e38e369dd92c7fb480ef25ec369178f9f8c06a948fd89fcd9e77e20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to compromised WordPress uploads and disposable hosting, likely serving as a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=inapetencia+en+ni%C3%B1os+pdf PDF link annotation
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/ef8ee1100556768376647f1fc9eb9896/9741805964.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/6f2a4ee45537ee0096b09fff5b718b75/86090234714.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/femowe.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210804181803.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/91885211973.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/60917645102.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081b5a51c5f0---xomasuvov.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a68c26f494---51012858096.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/3715326577.pdfIn PDF document text
    • http://cy2hand.com/userfiles/regefolup.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/zuwagexoga.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/958174578.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86d0058565---53717318535.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8ece5caec---nutafope.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/rorexurokiwoxanonena.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/49797169434.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849379c00bf---63298760462.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2de74851c3---gowozaxusomulinezagofiji.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/sododetiwamuvaw.pdfIn PDF document text
    • http://ccshecea.org/upload/files/94626604152.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/05d66fa754461946bebbba586be2f92a/monomu.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/dubajikurufobulivo.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c08cd9cd---36976521921.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/jejivazirubinafodijufik.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/nufivobotadusasodo.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_off0000e2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000facc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACC 10624 bytes
SHA-256: 692fb06989532a08bfa2fa007a35546b46f830b5539bf14af895fc28c71c2ec7
font_02_sfnt_off000112fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FC 19716 bytes
SHA-256: db4cda06192de4e0076a5405cb768286bf975459eb3b9f9923176551290f913b

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