Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bb1ae1682aae2f…

MALICIOUS

PDF

89.4 KB Created: 2021-09-06 02:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 12c55ec14506b288ea245ef9d9a66e8a SHA-1: 9d3bfc2cac444a14ae3ca85c8154635b44b35d87 SHA-256: 32bb1ae1682aae2f01a6563b5e3ad1d28f67c34994d9e3fabddaa719b5ab11c1
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to websites hosted on compromised CMS platforms. These links are likely used to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://messianic.live/wp-content/plugins/super-forms/uploads/php/files/6228021f2c39b8c651e32561ee72aa89/66489563208.pdf In PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e083f2107ababd13e5e3b80ec84d8786/87022896475.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/lupodedilopoj.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/63256202070.pdfIn PDF document text
    • https://songhong.info/userfiles/file/rolirinumulejuxibonuxi.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/23956812250.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/sarevuvariromelesur.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210624155254_1bnllz.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/gasumuta.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/rf8s6llmjbfk3k3eid3mtpmfnn/98717968500.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/nagufuwidejedosimen.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa70d82d50---kozapire.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/muzobabol.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf67dc0c614---13515373630.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/rukejekopafadizoxiguj.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/nudaredidemazisejugawip.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210704115806338.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a233e556ce6---10929945080.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/nekijo.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/8470924792.pdfIn PDF document text
    • https://agrando.cz/files/file/tujikidixumemebim.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/9a7d7bbe1531963212b0934d51b52bd2/mopiwekikofixoto.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/jazudi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=electric+field+formula+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_off0000f6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 19032 bytes
SHA-256: ba56dc4869d805d33c0ce88f0fa44fb89e8ae9d590ed9c8755be4888002d83d2
font_01_sfnt_off000127a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB8 10592 bytes
SHA-256: b47412815665d5b3a3e918e47a90a28c222f39f8b061c382188145b299b28838

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