Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7660110d2908dba…

MALICIOUS

PDF

86.5 KB Created: 2021-07-29 21:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 74351a68696c8dce026ee9c773397651 SHA-1: 20421209e9853ac5eaeaa96e3d9bc4fc4721f753 SHA-256: b7660110d2908dbabbf7a302ea5b60633952e404ba0f8c0b978c5db147d88cc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://svltv.in/userfiles/files/60171792477.pdf In PDF document text
    • http://metabolit-plus.ru/files/file/xowejirogetuw.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/a1bc08c7eeb324aebd65a23091e8b3db/21407577927.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/51614416288.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/rpd5i3pcfohsuoan0ig9m5vqii/7590783507.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/79094710705.pdfIn PDF document text
    • https://ecoretras.com/file/zozozojuxogumofakonitu.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a723e853455---dotebixupo.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/54621970b4ba506dfea0954321415f7c/pedodafufir.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/5a2f68254278a9a61c1dcd71db357599/58416659878.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d8125cb96---39515336186.pdfIn PDF document text
    • https://tessuno.com/upload/files/60d42b0e40ce4.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/85385138608.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16084c17234ca0---76926721119.pdfIn PDF document text
    • http://praguetransfer.com/files/file/lelomowibajuxovin.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/95072159915.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/ropopemurumebidugutuwe.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/39ff0c5d234ae30f64acd57895891a61/gitetewitesidavekifux.pdfIn PDF document text
    • http://getem.plfiles/file/85431516396.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5af1f248c---zisitotisojil.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/72302526855.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/majafawenorutatevuno.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/85104385032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cepte+minecraft+pe+indir+%C3%BCcretsizPDF link annotation
    • 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_off0000ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10247 10896 bytes
SHA-256: be418528bfca40ad60f442b0e3f3b32beae35e40e8108d86995aaab84af99b6c
font_02_sfnt_off00011b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6C 18860 bytes
SHA-256: 833da02097bf071f30b3c4e3d2a587020da84345730802d31410b2142644ac78