Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0f10ba1245f81a…

MALICIOUS

PDF

255.9 KB Created: 2021-07-03 00:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20f8c71ad702e2b6fcd1b79cef2fb33f SHA-1: 7905dbc4bf19407fb167a5ed1e494b6b0427301f SHA-256: 8e0f10ba1245f81aaa644b0d17392d7f148db7db5d1edc82bbe99e5d4ee88b95
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or unknown domains, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of external URI links and the overall detection pattern strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 5

  • 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.
  • 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://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea13c4bcf7---rolenipevi.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea8f66409b---xifikakotawizewegimikape.pdf
    • https://atraba-holding.com/userfiles/file/6990423028.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/p7jqdou266e6obeoh8ki2909s2/88994600080.pdf
    • http://zeroseistudio.eu/userfiles/files/75951843777.pdf
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/11137692446.pdf
    • http://pressvaluation.net/userfiles/file/zedaxididuririgozakifa.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084293cc56ec---rizesogufi.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41a85b7a4---29751519485.pdf
    • http://acmemask.com/upfiles/editor/files/95091852054.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e313ce8ba0---14628245622.pdf
    • https://mnlex.it/file/tuvadup.pdf
    • http://yuha.be/_files/file/66691281709.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fed1caaf1---72330444131.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa024bb2b5---galulafuvugegoweripuxomu.pdf
    • http://oticonshop.com/ckfinder/userfiles/files/rasejutotewaket.pdf
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/zudojisavu.pdf
    • https://plasy.com/uploads/file/21033538234.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/d63612a63ed72a8ee20138d69a50a52a/42838766946.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/tmci00gq8ef2h7nrl6cb22o4mb/26755188562.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/kg7kble4p7tefnko3olsntitig/60090205612.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a407270daa6---wuful.pdf
    • http://ei-windykacja.pl/upload/file/18751283503.pdf
    • http://pamat.ro/UserFiles/file/94997620349.pdf
    • http://castrolmintabolt.hu/images/upload/file/21276029385.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=hawk+with+black+and+white+striped+tail
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00038e74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x38E74 16792 bytes
font_01_sfnt_off0003a68b.bin
ee84302ff105c344a94e45d233a305c4a1f61caf7648031dc9a81d04c8d2a574
pdf-font-stream PDF embedded font (sfnt) at offset 0x3A68B 10800 bytes
font_02_sfnt_off0003bf2b.bin
49da8cd1b7ca79b74fc54131d3facd9c68a699f8f7a524c06d26fd4c18cf1299
pdf-font-stream PDF embedded font (sfnt) at offset 0x3BF2B 19952 bytes