Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d7f06d894d99c0…

MALICIOUS

PDF

118.3 KB Created: 2021-09-03 19:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 36f1fefa11973805f5a947895b2c9ff2 SHA-1: 4670ad9b93a174d98aadc16cdebeebe953b2988f SHA-256: 09d7f06d894d99c0c3a2bebd53f5c4c4cbe0925fe4095294480f4fe88247c65a
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or are hosted on disposable domains, indicating a phishing or spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

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 http://veterina-hrib.cz/user-uploads/files/pupuxazikejedo.pdf In PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/f6b015e6cc183f308bc627279176deb3/dafifadigovilaw.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/59111202148.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/96341186001.pdfIn PDF document text
    • https://storycycle.com/ckfinder/userfiles/files/5057922918.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab877c90d80---38525406772.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a23a0cf3d---15190848099.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/9980928597.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbae808dce---mabirurabumu.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/2531688826.pdfIn PDF document text
    • https://dcimx.com/files/lirukige.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e69eebe05---63891979829.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/43412877109.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/fokokomu.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9f92c1b5c---94366547731.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/99636293843.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab22efd06aa---pukotute.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a304ee1b9ed---xuvowezab.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc515a2ff3b---beboregodofi.pdfIn PDF document text
    • http://selmanoglusigorta.com/userfiles/file/pijixuguvorom.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/49870490501.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/f88ab370cf84c74034edc2317cc55043/seserokexuwejoxizuvug.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0179191001624353367.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-8-11/20210811182225978886.pdfIn PDF document text
    • http://aweibel.com/Photo/file/46990578144.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c06e062f2---gidobodusepekoroxikob.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d25149f2f3f---ximurezafizupegix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=revistas+de+bisuteria+para+descargar+gratis+pdfPDF 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_off000162f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162F6 20788 bytes
SHA-256: c7b00a8c4c36ddcc7746977f85d2d27f4c7bd7e132f3c418f1818b3ab0b03dc8
font_01_sfnt_off0001980a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1980A 10876 bytes
SHA-256: 482904177fc9e0cf9a41a52091c384eb628f24df93166bec09fbe1efb8a469f7
font_02_sfnt_off0001b0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1