Malicious PDF — malware analysis report

Static analysis result for SHA-256 b375134947d67171…

MALICIOUS

PDF

78.4 KB Created: 2021-09-18 18:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8c076bcdefdd028ca66bd5c5b0629a89 SHA-1: c1bcb5fe1708c80f63544002dcf7c0fd3580f97d SHA-256: b375134947d67171922471b32098a33c9ba33fab2464113c9b2a91c387e883ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous unknown URLs, with several hosted on compromised CMS uploads and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://hzqzg.com/d/files/pilumerevifomemokuj.pdf In PDF document text
    • http://tdvvietnam.vn/webroot/img/files/xujugodemuxixirix.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/figuvab.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/75444770909.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/73057287449.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/82248078593.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/55082651574.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/76548358347.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/fonovezesunamoxigef.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff7bf70c09---motilusiw.pdfIn PDF document text
    • http://rsentco.com/upload/file/44017536980.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/4549401527.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5ef5a0b79---kibafum.pdfIn PDF document text
    • http://cuadepthanglong.com/images/ckeditor/files/zogojijasawiloka.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132707e7fceb---98904307965.pdfIn PDF document text
    • http://shesob.com/file/files/zuregimanewumezageneni.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/49100280490.pdfIn PDF document text
    • https://geniodelweb.com/file/5490326801.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613b52bf9101c---xonofidixezojoxakiw.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/88955014515.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145704a2a7c2---lisis.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/23664216734.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c104cc0b28---dodeniwutuvofegewele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=warrior+queen+1987+full+movie+watch+onlinePDF 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_off0000c8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C5 18380 bytes
SHA-256: b0355a3b46b13f7fb0ad180817895cdee9f5dc757e140923ae378f262cb63a9c
font_01_sfnt_off0000f904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001111b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111B 11300 bytes
SHA-256: 73e00e609df96e254b653c4f5b1f45456e355f72ba56566670c715dd7fc92a7c

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