Malicious PDF — malware analysis report

Static analysis result for SHA-256 a690d059f3af82c7…

MALICIOUS

PDF

84.7 KB Created: 2021-09-02 03:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2e7e2b49893d1c70ee7df89cbd0c50a9 SHA-1: 8c2d7efb1fee1410d39abaa2e56bf7ae0d833cd2 SHA-256: a690d059f3af82c78d6cd8cdc07996fcd2c24d6ec03a8eca855b60f72817100f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://catamma.ru/uplcv?utm_term=magnetic+permeability+air PDF link annotation
    • https://sssmri.com/ckfinder/userfiles/files/14845197558.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/74gun13msorsl2nve9pjug6du7/vajavobebawiwixiwoxe.pdfIn PDF document text
    • http://nfc.soo.jp/file/moxotuzifagejinasawe.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/79343055402.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/29777792309.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/60833254040.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/tidigofovomuji.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/rotebakejaluzirigadixajo.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/cd5d152e3cc47a5182cd5ac48e5b976c/82610117002.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f668f7ead16---3955547513.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/75225308396.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/xubilukokodowuluxar.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/caae769616c8d8c8d72ed9f19f1c9c30/kawugogafikukepif.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/wowenumibetutude.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6cfb51eec---xeturejizanodilemilaremen.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/22249973512.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16074d089015fd---gireru.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ab1055735695054e11b6fde5aeee1bf3/zikusadosu.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/dureriborepalejobikelu.pdfIn PDF document text
    • https://hijaustabilo.com/contents//files/86668944795.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc60418694b---10603825644.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dbec54345---xurataxelexilagili.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/95471858003.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/lipijuxokesifolutud.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae154b94b2c---toredogegariwixinadorej.pdfIn PDF document text
    • http://lowdertraviscoats.com/clients/7/74/74ec8bd2877f4db8d0b9f56bae0111c3/File/37279566630.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_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 18292 bytes
SHA-256: 435a3f8a76ad81958f8211593d467dcf420d936791d51c88d51f086ec72fefaa
font_01_sfnt_off0001137f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B96 10676 bytes
SHA-256: 5462ce9dbafdaf81865551f2e45d6d83a3dfcf568b9d205816677baba65f8617

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