Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a6397c845c6a19…

MALICIOUS

PDF

77.0 KB Created: 2021-09-15 12:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3fb134532cc6c1c68baf931f762e9f1f SHA-1: 3a0cad9c45a27e674d30264565016da227c808fb SHA-256: 76a6397c845c6a19141350c391d7e01bb9c93526594421306464da4a29e671ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'kaagaz scanner app download' UTM term in one URL indicates a lure for users seeking software, likely to deliver malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://cructi.ru/uplcv?utm_term=kaagaz+scanner+app+download PDF link annotation
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/tekanaxez.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/81589995742.pdfIn PDF document text
    • https://repetitorebi.ge/userfiles/files/mobagajewibadoditolazi.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/fagij.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/81856747180.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161419bad647fb---sotuxujatexurisulur.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/kosedelu.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/jerise.pdfIn PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/renepeloxovapamud.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/72821660265.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/tulobepidawegigamaxuw.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/94703774038.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/10941996165.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/38208035955.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bcc051334---vugebadizavenuru.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/72544343483.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/taburujiruti.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0e0f0d2eb---nudalavanirovomiluxu.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/4068888160.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/xisisig.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/89498665592.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/92490711146.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_off0000c217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC217 19880 bytes
SHA-256: d1b070bb43e38c7e0b6d06d82519ac517dc05a4b9724d62e8fc89d5bafe5e1c1
font_01_sfnt_off0000f639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF639 10636 bytes
SHA-256: 03b213534071302979b0f07a92854dfb0b369b738c1c28512b1554b5616a8733
font_02_sfnt_off00010e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1