Malicious PDF — malware analysis report

Static analysis result for SHA-256 605c5f85e926002c…

MALICIOUS

PDF

74.5 KB Created: 2021-07-03 17:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2ba936e7d56a9970fb5676e0acea74b1 SHA-1: 7818bb43ddceef2ae1c0f6f299c546b60f8e1d87 SHA-256: 605c5f85e926002c4fc931e8dc407a3a274e38ed27168b4ba94f6fc402790cb6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://smidgel.ru/uplcv?utm_term=305cc+to+hp PDF link annotation
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071ea072b9d3---xexomawaz.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/51502ac1cf9af24354260701d1f5f1ec/bugamamifug.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba35b86fdd6---68117443236.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/48266364687.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/pajuzitewerutuwupokako.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be38f2ae31b---47075033914.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/24373307693.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/33828660781.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/fiwozakema.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp//files/16605175636.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba007639d69---37630914116.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff7f78829a---xisaxulelatuvodavut.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076fa05c10e1---meruxitez.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/78942159342.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/38af0b805ebe021ce98847dd22a5a30e/71840358345.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/miwozugometarefe.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/gelafajatexutudi.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccac6df44a---xisofudupopazakizovus.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/rivozimekabogunivega.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608255f0155aa---dewolutusuwiwowizabove.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/nejiz.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607de8246781c---wojajiferajewabenedug.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/xobuzuki.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_off0000c39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAF 16728 bytes
SHA-256: 9ac6ccbb32887859b50cd222cd376edefbe6edf9f871e65c791fe0c7b9a4dccc
font_02_sfnt_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 10000 bytes
SHA-256: cc246e4c9d26ef362482aead9e23f2bf42be05bd9bc495c119b2b8c31e2c208a

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