Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f785d98dec55a9e…

MALICIOUS

PDF

95.5 KB Created: 2021-07-24 08:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c1cf738a39431ea192890a303c01ec16 SHA-1: b602767a0b1166a5ac72c39de35e681e9d3f2a42 SHA-256: 0f785d98dec55a9e5425d970f9ea38a862aae4fb731ede95c1785f36e493bf10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further malware or phishing. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27f3f0e444---dapeter.pdf In PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/c3i09b04s1ke9sdc8bsld1q7f4/wezovol.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/88501861981.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/347076235.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e8e96b633---xisulefu.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b96cbb534ef---59399894715.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/a81ii4n3dmspsa4rp8ecca4ds3/vigelofexizufu.pdfIn PDF document text
    • https://angkaganjil.com/contents//files/lazemelivijanozalijomul.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/kumasanadifolaladim.pdfIn PDF document text
    • http://sensi-leszno.pl/userfiles/file/luwumujumevigurolusivit.pdfIn PDF document text
    • http://adria-ex.com/sozajajusimudopufuj.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/47029632665.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d6e4e12c7---18077500253.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c124a26683c---94154082089.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/1395164278.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/nk5elvomj2b9nqelc5sduammht/junisaroletivow.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c31c1bf7f2---tudiji.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160899a3cd1ac2---92851746140.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609647d71cc9e---79858999312.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba126430c4---652014858.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/tapifuligisimajolopapo.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/6ed77288413081273cadb38412e9b755/vosulekexita.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/81062038177.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nc9mnsa8pgdei31lumiju0h1k7/koponekidepibikupul.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/jajivigizigilaruk.pdfIn PDF document text
    • https://bursac.net/userfiles/file/26826693055.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=dmx+funeral+truckPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 10412 bytes
SHA-256: 3b051867fa8ff897c1789e9b5c64a4dc0c731c6864e8bf62f7e0a7672091841a
font_01_sfnt_off00011307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11307 17560 bytes
SHA-256: 18ee340309156774f35c9d18b8cfbaa683a0946ae9bcc6c763852f1c6ffdb8b9
font_02_sfnt_off000140ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000158fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158FD 16320 bytes
SHA-256: 281a8e0f5d6ff93c8b68c010f229fb6ad7bb76303726e8bceb98a17be6b52fdc

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