Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89601b5c8b67523…

MALICIOUS

PDF

90.8 KB Created: 2021-06-26 00:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5d650036ec331c5149b5d17f96502e3f SHA-1: f5b832f03d03673555605fc3a03428f22461292d SHA-256: a89601b5c8b67523390820651f2f64ba36a492e0097e8fecd1836eea8c4a5903
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link farm pointing to numerous compromised websites, likely intended to host phishing content or distribute malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple distinct hosts indicate a deliberate effort to obscure the final malicious destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://archism.ru/uplcv?utm_term=how+can+you+see+hidden+messages+on+messenger PDF link annotation
    • http://ngocvietbungalow.com/upload/files/febupaxubeganibowabiwew.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16081314cce291---mukarejoxazokelokot.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160879cc116fe7---kupurugapes.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/0adaba61b87c92b4c8db81d51a8b950b/64426583509.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/9d2ee05630b799e3378dd6dab32ebb91/59458529589.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091fd5a8c9b3---baromomivukusiwapomag.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/50122905606.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/nowikuliw.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/mewulanat.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/sanusukevazot.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/95321109333.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609696251d406---85269207308.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/brv901slearev6lle4iadd0dt5/bajidosulo.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/68743833478.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/31d4906060c13690492ee46b1eeaeba4/nepaxaguri.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/40949469904.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ospr6qgu4tukth2igog5n2tef3/48374347543.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/93002881825.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/f9d8cbf1de4fc147a79d9eb3b9307b03/zakowazopebaja.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/f25e8b8b383bae90f64dab043d811e98/vujimavabefexegi.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160766d17432a8---jedebozapomeva.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16095f71715551---78842013250.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/341b3aa7ee15f7f9ea7c5a238ba5191b/wuduxoforupapakina.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/ea4657dadd095eab54b6745d0a6582c6/40483427584.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/menuwoduvilajoliveval.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10060 17300 bytes
SHA-256: 77e169e564bc1a13474b2d5b9509cd42ec37644571b2d8361f0231a669cfd9f0
font_01_sfnt_off00012c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001445c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1445C 10964 bytes
SHA-256: 80dfa3bc5ebb72ebfcc3301856fc08426138e709b9d26536ddc408b2a48fbea9

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