Malicious PDF — malware analysis report

Static analysis result for SHA-256 46329f571448de60…

MALICIOUS

PDF

93.0 KB Created: 2021-06-29 08:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 81e470a1de377b8327a12cfd8804ca68 SHA-1: dde2749666d83d5d5cd7769113de12c59ff7375e SHA-256: 46329f571448de602cbd9b41d577a3b53024e46546953e137d00227504d4c9d0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF sample was flagged by multiple heuristics as malicious, including ClamAV detection and ML classification. It functions as a link farm, containing numerous external URIs pointing to compromised CMS uploads and disposable hosting. The primary malicious link identified is http://totaldeliverancecathedralchurch.com/clients/2/22/22dae496a1749ae881e6bee195142b05/File/12633694380.pdf, which likely serves as a lure or exploits a vulnerability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ngocvietbungalow.com/upload/files/febupaxubeganibowabiwew.pdf In PDF document text
    • http://campfirewtx.org/userfiles/file/43796336184.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1680785476---vudezaligikifupaj.pdfIn PDF document text
    • http://mlkscholarshipsmilwaukee.org/clients/f/f0/f021f13c5c598389be7e913a1ae626ff/File/46227067421.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/g4lf2unl7pntm1c4dusfpsn3hs/60165174587.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/1594ae24c07c53c9693fa85e40f6d177/2782250876.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/9c87eeec568d0738052ec63db59c0ca8/zarakuvosajabixatozof.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/46847270744.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b1dbb7cda---87665063277.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828c6511243---newafataw.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/2c72j0rjg42b741nbvtu4rdvck/loliruzew.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/90008479527.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/eef5ca9b76a44d11f5edb30c09a0db1c/61788159317.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/21293787382.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/6sa76o2utm9kog8e5ttcflea5c/26656585086.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/idijpcbkusgbaccnegigqklqmk/laniruboxas.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/kigewabuweputibegowudite.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd469cdc50d---6077702494.pdfIn PDF document text
    • http://totaldeliverancecathedralchurch.com/clients/2/22/22dae496a1749ae881e6bee195142b05/File/12633694380.pdfIn PDF document text
    • https://digireg.nu/upload/tuxaviwigudosuwoluviguxut.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/bnks79e9q6qutd551ggubvakp6/61595071623.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=exercise+of+parts+of+speech+with+answersPDF 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_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B9 16732 bytes
SHA-256: c8b99474bb1348e057aae0cefe7ef0ffe2cc5ec1603a7a1b2eb97bd4c6572cec
font_02_sfnt_off00014c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C58 10700 bytes
SHA-256: e53b2c372f4d8e3cf572d142540e05522bbd1fe21c71be22e1ea517ae761ca2a

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