Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4306e4d5d8d053…

MALICIOUS

PDF

82.8 KB Created: 2021-06-29 05:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 092439353c1304d01fe43374d3323a39 SHA-1: 8735b6716ed2bdf69454498a40c3d4531c24ba6a SHA-256: fc4306e4d5d8d053557dee62e5b0e0d8c957f45b8a2dfa50a21f97c9106864f5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external resources, many of which point to compromised WordPress sites hosting other PDF files. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://crysiq.ru/uplcv?utm_term=wedding+templates+video+free+download PDF link annotation
    • http://controldellaves.com/app/webroot/arxius/file/dipuxa.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d22420802---14604054825.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/dbd2fea09058a42f3f21601d63c0451e/2508355198.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/efdbee90c3f3e75603c12e28ea3d3597/lasarukinirodemum.pdfIn PDF document text
    • http://s-moonlight.com/CKEdit/upload/files/97530051726.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/5ba6985c67e1faeac6e2eb71efd6e8d8/rorelipo.pdfIn PDF document text
    • https://argumentua.com/i/file/51715538550.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f088fd948a---kimer.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/0558874fce5bbbd0c0a654a1bbf89975/kesidizezalutuzaka.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160af5a6ca5841---10991548830.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/usfshfd1pj5u4lpvh681jk6al3/98423779180.pdfIn PDF document text
    • http://camwater.org/media/files/5526899137.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/e4d236ede9dac0923f2532a636a3c4fa/35022470429.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/51321538362.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/087281f3ac590c9520da4266646ecbeb/falukoxotuloxemawube.pdfIn PDF document text
    • http://edgecs.net/documents/jufusajafokijiwinijapejew.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/kulupidafawegimowopob.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/c5a3b4a7200d42cbe756fbb2ec9f27fa/96107277825.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770fa93638a---67119138693.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/pikedexojebivapifu.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/lisodiniwulirepovo.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/mot62c2l88fnoh26ugmu1bmc7s/14167266578.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/jinenawujapomolabomota.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/bitapubi.pdfIn PDF document text
    • 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_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 10984 bytes
SHA-256: 93bb48e6c2aa33793f0b0b1a30b8e2f3e42fc75a73c9d3957b17e48c41451c1c
font_01_sfnt_off0000fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 16820 bytes
SHA-256: d5e82a66917d36fabeae2c3807e8620ff25bf7210dae47a86998a71eb9b577de
font_02_sfnt_off0001259a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1