Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6f509b36aac292…

MALICIOUS

PDF

80.4 KB Created: 2021-06-26 03:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83d50d764b82d7bc12efa3871a94533a SHA-1: 2d78d1299dfadaddefd7d7f3d0dc71d07abe208e SHA-256: 7f6f509b36aac2928aba5ba4bb79b8a8cb7b10db17a43d053df52c8ae3a5c2a0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and an IP address, suggesting it is used as a lure or to host malicious content. The presence of embedded URIs and the nature of the links indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://aartipalette.com/userfiles/file/56331059641.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607541cc35d71---3024816188.pdf
    • http://kancelaria-perfect.pl/app/webroot/media/files/60112237149.pdf
    • https://acgroupenterprise.com/userfiles/file/36333424867.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160abbe3d483e6---zegazanageju.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a5cf66592---mebetedopon.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/41d2i24giel8q9a055gvb71stg/nulobimuzutugikozewulupe.pdf
    • http://stellarp.com/userfiles/files/1381933665.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c6322056e---fudizi.pdf
    • http://shhs69reunions.com/clients/e/e9/e92da0bc0099326815942f81a5c18dfc/File/70525185906.pdf
    • http://school19-zav.ru/userfiles/file/digedurog.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771e6778d54---54556306646.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/60700211bee6df88c9acba4e0e5ae2eb/15939438134.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb863e4004---tofexizetowabiwub.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9ee017df414a8db5104f816267565bfb/59499427799.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ac4f0be5ebba7607611f39e8ef617941/pofixetedufofolozux.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/de4ailqupletk2givnfn6da49k/wipazudejabudofejufos.pdf
    • http://kartinatv.org/uploads/files/sajudoxig.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607841b43329c---vepukuxelabidusera.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f77b59b248---tepamebilepuperarowef.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/tj8jeig1mscoaieeo2n850l280/19583547583.pdf
    • http://envigest.cz/upload/file/41393204349.pdf
    • https://bloomland.com/sites/bloomland.com/files/nowozunumevit.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa52bba51c6---maduzexutezoxixibasenaj.pdf
    • http://gesundimjob.at/images/content/files/41678090265.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+pines+bellville
    • 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_off0000d93f.bin
9dcef5e349127b28e5126931ed3a78c7088e7b4da563d7ee00b469108a36bc80
pdf-font-stream PDF embedded font (sfnt) at offset 0xD93F 17236 bytes
font_01_sfnt_off0001068d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1068D 16792 bytes
font_02_sfnt_off00011ea4.bin
d41c83a7b36074106c8fa1d260d5d3ab7e4ec2998f2c40e2ae21948e555e3666
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA4 10040 bytes