Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a622d35c2f7b12…

MALICIOUS

PDF

120.5 KB Created: 2021-09-07 22:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 250e017b8ab5f99f5ff243b920ec4874 SHA-1: ddcbe69135ca438712d6cfc5c1ddccf2a4449c36 SHA-256: b6a622d35c2f7b126a1339c968f62bfe08916c6e1af425ced0698872f08eb0a4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. It contains numerous embedded URIs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=tomtom+spark+watch+manual PDF link annotation
    • https://aslimitada.com/userfiles/file/97308462085.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/91363158f4e206a9e1a6a29e7deefbef/59806530228.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/16313338282.pdfIn PDF document text
    • http://northcity.rs/slike/files/kaseregobazirimusoxate.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/20768157397.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/64057566975.pdfIn PDF document text
    • https://digireg.dk/upload/pewunexina.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/61356538144.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/33943544723.pdfIn PDF document text
    • http://gu-bo.cn/uploads/files/33565934404.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a519522ba4a---duxobizizipejakerugiru.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160759a5a2eb7c---20895265255.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608101a29df57---33719106932.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce12aac502---sizuzij.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ece65f7b3---11554491353.pdfPDF link annotation
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/dv5rf87f2im27fmoj3cf54sq17/92356718754.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4780067a16abe7c84e461e61feb03b2b/mexot.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a66b315c2---fazab.pdfIn PDF document text
    • https://mszukam.pl/dat//file/tedonapomakekuwudesa.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a33a588b4c4---vetefakikuj.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160d9ced2eb08e---galogajuniturozamisaji.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/kosarininipikevobikigunij.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f1c9841ac28fe6a2bed6142472e7d7a6/laxemiwovurakobijuj.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/076ffa589d9eb39f72dedfe222a1a2a9/vijilomupamudawis.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18583 10656 bytes
SHA-256: f2f5f6151fbc537678ed1f63582238e06ee477ae2f70277a335c0c64be555509
font_02_sfnt_off00019dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DD9 20632 bytes
SHA-256: c183c6392fe3fcc5d660b898e8fe562d55b9226fbd1501130a301ebfe77a430c