Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2e30e093bf5bd8…

MALICIOUS

PDF

80.3 KB Created: 2021-09-06 02:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 44e45ff06cd3052391a04ac98c1575b8 SHA-1: 1420c00b5b6c9753ce217cd5edf66825780f876a SHA-256: 6c2e30e093bf5bd841af2aa92a1f004486361e4dc4cceca51d8bcea66269a67d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content. The document body was unreadable, but the heuristic findings strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba05cde0606---losufekazujegan.pdf In PDF document text
    • http://nagymester.com/userfiles/file/gupijokaxeserotafalaj.pdfIn PDF document text
    • http://oinworkshop.com/clients/6/6d/6d9161a7191ba42f41383a85782e2f4f/File/34568468771.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/66086285479.pdfIn PDF document text
    • http://regmac.net/userfiles/files/relovelubokanodupobulesun.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160beea2d4cf68---8056790353.pdfIn PDF document text
    • http://santehnika34.ru/images/file/765322329.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8d0b33c1c---49735823590.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/xowojoribom.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/ruluzizazujitipeg.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/derakuzawori.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607b186eee800---94407771392.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/40171502953.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/vnnl1d210e54ce6c38j8obn2v9/fupolasudujuluwim.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/34704836515.pdfIn PDF document text
    • https://migger.dk/userimages/file/tifojabebamoxejovabavifuw.pdfIn PDF document text
    • https://atl-50.com/files/file/20563370607.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606efe89e50ae---bexapenimov.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/37220185388.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/xadesigazevejikosewo.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e38ceb96818---gelifujetizijijowulas.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160984e1fbb160---90319680802.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/mufuwifugesabuga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=subtraction+word+problems+grade+2+worksheetsPDF 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_off0000d531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD531 16612 bytes
SHA-256: 5e27fd835184cc606df9585a87c733c939cec37f51e46fd768f3fd0b1b1cf9b8
font_01_sfnt_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 11572 bytes
SHA-256: 33cc6c360863828c3c1871ebd7feb6a9065e9aab962f10f15fc8f014eea364a0
font_02_sfnt_off00011b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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