Malicious PDF — malware analysis report

Static analysis result for SHA-256 1301e6e5c9e26031…

MALICIOUS

PDF

86.3 KB Created: 2021-07-16 07:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7da4f06088ae90b0e5f0f3f162b1e73f SHA-1: 549cc165c2f2de89c1ef28ddef12f8e425b7b8fc SHA-256: 1301e6e5c9e26031c462802eba487ba7d9d58c0585797f6d0dc3688af260d05a
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the heuristic findings suggest the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9f9079fd9cb269b8047325acc3992eeb/95821785389.pdf In PDF document text
    • https://carcable-bg.com/uploads/pictures/files/92955810072.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/a5ad08fdf22be24e9594be46f14eb7cf/fodexi.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/73980919814.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608b75d69545b---riluzonovetimugiwoz.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5c4263edd49a1e7b49a0d06c636cf44a/85710911304.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/i3bbrf5asrelfg6udala3lii63/55936824639.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/06b491763281b4480788c7c341b9e457/diporelenupumi.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16076bd090946f---77971671840.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/f9f14fb10446105587238d5d320fdf5b/bujugosodogebasetegogik.pdfIn PDF document text
    • https://liderpin.com/calisma2/files/uploads/wewutawutexolumo.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/sesojusuvopudowozopojajab.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e29de033196---mepufiwabevagesiganug.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/makuwifusuzufenina.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/genawuf.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/93899452565.pdfIn PDF document text
    • http://whitebearlakeclassof1970.com/clients/0/05/05755deafc47004aae723e515cf08a6f/File/4886554006.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/midonirevide.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/buzasidugob.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/nk6mba1uf7m8hukbjag4ibns4o/40077754919.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/97a882282be1331915877d92a33851fa/dazukifa.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/5e6cecbf2cd4a06727d756fadf35ac1d/61299683743.pdfIn PDF document text
    • https://soechi.id/userfiles/file/kaxowugilugezeru.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/8812927200.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/fd92c9a5a77421228bb1b7e2c90c1437/pazogelavezeditofaxetime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=prick+up+meaningPDF 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_off0000d39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39F 10480 bytes
SHA-256: b6c360a828af4ee17a640db8a03e2df3f04960ff9f47858437df8f1127a3641e
font_01_sfnt_off0000eb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5C 16572 bytes
SHA-256: ddd87d47412011c98474c1e9760306b0f7eb8d2e12ba3f8d989764dd82d53ab7
font_02_sfnt_off00010294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 17936 bytes
SHA-256: 522de32176379d4dc449d428c48a99607f2b5e00cd44558107db7fb940b2e842
font_03_sfnt_off0001320a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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