Malicious PDF — malware analysis report

Static analysis result for SHA-256 970e7c60045ec4b0…

MALICIOUS

PDF

94.5 KB Created: 2021-06-25 12:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b82f1794dc7f17e7080d70481497125 SHA-1: 6886ed4e118db4ae2257431b372f782a1f9f1856 SHA-256: 970e7c60045ec4b00ef1a33b987b161356513c84f314195a879ed191a681e6d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3cf585e56---zutufewejox.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608058b806994---3137354559.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160806e76131ff---69856595449.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7983e1ac6---66564440103.pdf
    • https://anthonygillant.com/userfiles/file/64580779797.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b46647042ef---95343811579.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/cb96f7686df2dae7dccb2d8c79f0c2b3/11408035286.pdf
    • http://ampletrekking.com/userfiles/file/zibijazike.pdf
    • http://www.klimavill.com//data/editorfile/wejapuxunefadezorofixa.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/1o2vs7otbvn9ugcib4gos90b39/36472498764.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d3af264e7---dupupuvipaluvenamedamakub.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ljen6ageumdlcl3esfp0881sl6/89436756558.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee504a93f6---37482032795.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7e22c1d3442be3b09b8d099744f716f6/vijemixozimawegibotanet.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/7450458e7253563f7c5eab18c0580b74/zewaxogizixijaginigivamim.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/60b9b1b3b07e0b27d820e1a36a84e089/491609059.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/f33a624ebdfa9a60679bd6cb1e2a08f0/worekuvad.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=buried+black+ops+4
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f1bc4dc35ec7d0d4efe6167381fee9bc/fefigadoxi.pdf
    • 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_off00010169.bin
f859c156e9437f29ca8ddf53774b956454a499d066cc675c8e65fa201e9018c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 10768 bytes
font_01_sfnt_off00011a19.bin
c6ce45362904736b67b79a5da86a29eb8a708fdeca64317ee06947f2955cfccd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A19 24124 bytes
font_02_sfnt_off000155d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x155D2 16792 bytes