Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed004f32d320085e…

MALICIOUS

PDF

124.0 KB Created: 2021-07-04 18:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 759e549b8d1da99d6024c62373932877 SHA-1: a22c63a64714fa7dc415f9eb5dd3493b668c9d2d SHA-256: ed004f32d320085eff751ac85e18ce65091ea4b978080176a19e7f2c10607a03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608700c8e4a90---94469549715.pdf In PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608886fc69ee9---xodinonu.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920d47f391e---diwofanufibubo.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/2af57e380e38bd80bbee7a81ffdfa158/dexanitanirixa.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/bipafugusebekanimim.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c98c9674ab---telajupemafurefo.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3697acbf9---tizozukelosakimojemifadif.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/f74a340ca95da5dc54db1ec74b7bc081/jakumidixevudewupopuzu.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae26de858c7---lolukuduxixagijejel.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c107eb46a3---wujugurujemufuj.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/bigemawer.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085f5c840950---winidu.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb861ac943---78706225650.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/b302136e85daea72f494e5ba039fa564/67440315988.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/87168180239.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e5d41497c---13722352889.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/26777951094.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/30205608039.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b669d977984---4553126696.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/79771113683.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/1399808958.pdfIn PDF document text
    • https://cncunse.com/d/files/30318074270.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/nibipoki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=self+inductance+of+solenoidPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000162d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AE7 10544 bytes
SHA-256: 5f438ee445ecc0d0302ed3ae9e57ee83a7809e838d767f3f90c317aeb1be4ddd
font_02_sfnt_off00019308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19308 16384 bytes
SHA-256: d49cd2e1dfe18d5feeb756d8c64acc27085e230f40cbffde8991e7cba9eb10cf
font_03_sfnt_off0001a999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A999 20640 bytes
SHA-256: 31e41f101aaa2c24efad9637e905b8e198a3fd7ab871d83f7f8a92e4f19db67f

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