Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a94879bed36388…

MALICIOUS

PDF

82.0 KB Created: 2021-08-29 07:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: e4b5472c2ac04a3ce5f19e0aed523f5c SHA-1: 950214809fc66f5b8a6f8aaaec74436db6863fd3 SHA-256: 32a94879bed36388263d813362983cb6395373b7c58ea260f1a01ce7b6a73380
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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://drafthe.ru/uplcv?utm_term=accidentally+compromising+the+duke+pdf PDF link annotation
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/fesaviritebejodakajozunox.pdfIn PDF document text
    • http://tatennis.ca/clients/29257/File/gajufakinirobesejanekezuf.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/399828050.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/vnvhcqjg9b9sena167p1u016n6/wedojulegupejofaxon.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/mekize.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210824185435_bmFuYXNlcGltZXd1ZGVub2t1.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/dodakumedawuwodojujafudo.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbafc8d5fc---jajiwejixejelolo.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f45b504f59---52885100314.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/fobisepaxawiwofajudid.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/84955031922.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/vuwadugeded.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/846aa149cc6e623ada653f81117ab445/22408135212.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/3783146348.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d29a03974---kodemigenepag.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/kodibepofapiro.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/56808051969.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/78775299576.pdfIn PDF document text
    • https://miruyuta96.ru/admin/ckfinder/userfiles/files/92543156262.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8de9cc528387343ec0e1db21cd2179d1/27945858760.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607880817f227---gatafojemodijatusegep.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/p2r9r423demk7d5usvpne9eibd/15214700052.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/69723470261.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD800 11356 bytes
SHA-256: 2c321aad59b728bf86ff2a2e0d26ad66328745b9fa510038d4af9de787f7bf2e
font_01_sfnt_off0000f262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 17392 bytes
SHA-256: 0e902cda040997e018c62ef5a26d40735b9e3bd33b53a5269c3d8275b245349f
font_02_sfnt_off00011f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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