Malicious PDF — malware analysis report

Static analysis result for SHA-256 79970c6c969b52b8…

MALICIOUS

PDF

95.4 KB Created: 2021-09-07 10:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 04f49abd10a17ec5b1dbd611bdca7c00 SHA-1: c31730f7d37a6b50eca524eed9fe1ab0166f0bb3 SHA-256: 79970c6c969b52b8722f4cabaf6aa87b12fbf24bbf445ec187279f755527d376
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload directories, which in turn host other PDF files. This suggests a multi-stage attack, likely for phishing or malware delivery, where the initial PDF acts as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bcbe41151---ledonarujizerixesiliwa.pdf In PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085cf3b7b633---zozekonifiwaxow.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a53ac7d159---59678443798.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210715164306710686j42djt.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/5d37f14533f33c99ecad7d3078a8f5f3/14888261343.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb63699821---rugekevovobetimuzapo.pdfIn PDF document text
    • http://zakuskymoser.cz/www/ckfinder/userfiles/files/gafofokejaw.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/vg910fd91du7vcm50lgvrhbkuh/39512890991.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/lewikesumak.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ca7e018e---75081595739.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/49827899110.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/5fariee95curclf80cl2e9646a/dajonojot.pdfIn PDF document text
    • http://vhz.cz/user-files/tamofuwogefatubobo.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/56863743188.pdfIn PDF document text
    • https://ganganagardentist.com/userfiles/file/sodojenowavir.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/cf516d561fe6745c93e0f2f5c091a926/43157820363.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/19222030089.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/5femdjbr31r5r18g74fdfbdcjr/9991875353.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/8c6e39c7e96752133c0849d3a5f8294a/90409331556.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/63350583848.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e479ebac047a294747c457a72de469af/foxoferoje.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/noludigav.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/tufap.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/533537877c64ea41fb9486f4c6101f6f/23223096945.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=devolo+dlan+1200%2B+wifi+ac+starter+kit+manualPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10928 11276 bytes
SHA-256: b50945ef4ecc9d57dcaa75460f49bab3e8885d9833387497cd1d921cdad028ed
font_01_sfnt_off000123cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE1 19868 bytes
SHA-256: d3e40e1297af2078118ebd019ac0075190b75cce2f37ffa200c2b0bdd9fddb24

Open this report in the interactive analyzer, or submit your own file for analysis.