Malicious PDF — malware analysis report

Static analysis result for SHA-256 500f711f87449db8…

MALICIOUS

PDF

105.4 KB Created: 2021-07-04 15:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 97953b8d0a82072d0bfa03c05f943b1f SHA-1: bf3c5ec201252f20c1a9c0abeea1b107732df363 SHA-256: 500f711f87449db8de414b7f0899741d4aab05d6822ad428b245649912342b54
156 Risk Score

Malware Insights

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

The file is a PDF document that exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, or parcel deliveries. It contains numerous embedded URLs pointing to potentially compromised websites, many of which host other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malicious content or engaging in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/dkueoe1ne5ccn4qnf1vqeff4fc/wekaxodivavokatovafitaziv.pdf In PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072368bb172e---misexuzoveg.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/e72a09b1309619015299d5b6fc478672/lufog.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa36d3075bd---matul.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609491393af6b---76201155265.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/cda61a65642339e8827af8545781ff62/78020468792.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/16178959907.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/cfdi7rucam8790e3km4oem5j63/supulotup.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/3552031631.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/669b896dfc619444acf333c83154cdd0/46062952799.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c4425d05---vilogulezazikazudijotux.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/551d64ca9179433b5dbacd7cbbac97eb/57778749294.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ca9c842401d---mifafedotazejunokojo.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a99c0c335490ff064e3a493201e75043/zojekiromatib.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/miketutafosukijedixe.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/csljg93var104856e1usrpplvo/13042639401.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/sabadoki.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/15521326834.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/24769148193.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/rud83km28cvh1i1jfviaevntfo/41174534342.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d207318cf---65173935245.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/72538665071.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b1a12f2e05bb753df6e0af0bf66bf4f1/5537609999.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/9e6e16a48598003bf4e6ce232f7eb882/84447528019.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/31667024664.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+office+script+dinner+partyPDF 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

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_off0001378e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378E 18224 bytes
SHA-256: f2173c9ea166db4f63a3bb5086757f239b4c96d940684b5d0bd82e30ae827eda
font_01_sfnt_off00016755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16755 10748 bytes
SHA-256: 5827b01f678fb53ddd16226bf1e40531cad5f6bec9c39942191efc93d100f0d9
font_02_sfnt_off00018013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18013 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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