Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa617dba935eccf…

MALICIOUS

PDF

90.1 KB Created: 2021-08-10 21:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d0fbb6a0a77dd67572958e9d7dd19a31 SHA-1: 0d79467e215b99b38b7ec4cefce20fe911cae7cd SHA-256: dfa617dba935eccf8da1c7d5db392e2c7e9a0f715e16a076a8200a3322acdc59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or spam campaign. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://soudurelausiere.ca/upload/editor/file/53814567519.pdf In PDF document text
    • http://scheiden-maassluis.nl/uploads//file/33854049854.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/a2571b8479d8bc28c276b1d6d9333963/rokoka.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/67268921423.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8fb74cfed7a7d5383c15806cb8fdf073/nodesubin.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1607234c2511f7---wizur.pdfIn PDF document text
    • http://dzbnf.com/upload/file///72143821423.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610031b24f926---28147113748.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/xafolikuxiru.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b51274891b2---92361653241.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160abb8c00afc1---56101236076.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/62004247459.pdfIn PDF document text
    • https://ntc-container.com/upload/files/sarigimebo.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4442d1425b---12357451941.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/92539609636.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b195368782---97399880319.pdfIn PDF document text
    • http://chinazzjx.com/d/files/nenidoxiravodipiwofixax.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/lakukolegon.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/912e6bb1bd80da3bfc1a48c9cf45046b/raturovuxu.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/92863571472.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/75185553622.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fab20cc4f5fe11e62df4cdddd6505544/52288313053.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/japilapovawesezominu.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/40058022745.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=lecturas+cortas+de+comprension+lectora+para+sexto+gradoPDF 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_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 18472 bytes
SHA-256: 2858bb07b8fb102554f43a1613350c76f2899491ed901ec78b289eccc68dd413
font_01_sfnt_off000125d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D3 11016 bytes
SHA-256: 0a7f09813ca4b520750149663c66b1b1b6f2901b01066802a4e4a9a24d4ec034
font_02_sfnt_off00013f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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