Malicious PDF — malware analysis report

Static analysis result for SHA-256 82df60d62357283f…

MALICIOUS

PDF

134.3 KB Created: 2021-07-16 02:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e6e08f6f73da3e8728561dff9548a14d SHA-1: 1f825660c159b27c9d2c8a28177698e19782568b SHA-256: 82df60d62357283faeeb7bb01d40b6d60da0a149cbd9b66d6aaa97b2a1ed2ea6
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, indicating a link farm or phishing lure. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609040488fc79---2474072017.pdf In PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8e9179e59---58117506143.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/wapelolit.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/mexirenabowekatebudo.pdfIn PDF document text
    • http://doer-sh.com/Uploadfiles/files/13154217212.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/2f0235e772a58f6ac53aa401bf97d09e/newodi.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/46055559865.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e138962b24---kefakeb.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/vilavaburopur.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/1ee5cd4dduak6me5nv2p4bj786/puwizu.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/rudagamijibibozaxolom.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/2gri9uok8cafipn3m5ipv9hece/98621086901.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/ci2c82rqpd45o2bpeu7h1uil77/nipividavata.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/8c825f910b39ee605b41a36733e94b49/5910017044.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fd6605b47---popedime.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/8bcb0877495851a81d98f98d9ce0e865/zajujalejebinota.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/c4ce91b9f308f3556e4bf8af7c647f38/56852125551.pdfIn PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/tuvufutafemawonun.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/h5aoasvl0r6gk1ndpb8un2i9t3/48405493944.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/gevukurinikedagovoboj.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/9724a300e42281a2e6fcc65d6a742949/xunaxunijafipuvo.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/cc65c7f843c218b48d88e3d9d83ba965/92176238685.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/67826012315.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=therapy+induced+dissociative+identity+disorderPDF 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_off0001abf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABF4 10808 bytes
SHA-256: 8a0879c5105e57b66f5a68dba14a1e91e7b296f3daab57bcddd34c2f3ab992ff
font_01_sfnt_off0001c4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4E4 17984 bytes
SHA-256: 7241d3d95c2d02aba4b77696bdc5a7a733a339d69b988c2a69a19b8e57d98a3d
font_02_sfnt_off0001f310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F310 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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