Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc34bf9902693b2…

MALICIOUS

PDF

85.9 KB Created: 2021-09-09 13:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dbd40fc07cce47ccd4b0537327ca39a1 SHA-1: 68b17193f2d827d54cf6db16085a25730ae16db7 SHA-256: edc34bf9902693b2a9c97e4a3f43e04a24f9ec35f5946b6f7727228e20e30099
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to compromised CMS uploads and disposable hosting. The document body is unreadable, but the presence of numerous external links suggests a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613316bd92cb8---37254532129.pdf In PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/lojitag.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/pexoraxamiponod.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/jekigojodonosojepukikizep.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/nojosevovukipozem.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/26402527725.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/kezezunex.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/radanezewijas.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/22458478856.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/161357e0fde76a---51696839342.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///64782575878.pdfIn PDF document text
    • http://traktor-tv.de/sites/default/files/file/gipabimezagogakevopa.pdfIn PDF document text
    • https://adci.vn/data/upload/file/64866690168.pdfIn PDF document text
    • http://maksimetall.ru/files/jokesezodamudisinibale.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138372b95774---135706460.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/44043989643.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/rajelido.pdfIn PDF document text
    • https://orrizon.ru/images/file/41511897938.pdfIn PDF document text
    • https://redac.ch/upload/52051852805.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/wexukav.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd3ff71fe1---rimatomon.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/95527667085.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/waxetaradisumozudimebi.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/fiwinigalomosadetetej.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/poditaxefinesodegekazare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=siri+type+app+for+androidPDF 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_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 10468 bytes
SHA-256: 06c23cbd2e2575f955cd898170fbb78ee01bb5fdb0e18a0837d218354973e1ae
font_02_sfnt_off00011b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0F 18056 bytes
SHA-256: 9548c9600142d8a4e058c594b2199700608c8cff1fb70158245d7dcf397c8a53

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