Malicious PDF — malware analysis report

Static analysis result for SHA-256 5332af295d274068…

MALICIOUS

PDF

124.1 KB Created: 2021-09-06 14:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7786a6a3c60b8b051cf68ffadbe80a06 SHA-1: 1c6b93da785231ee398d26934c13c8813b1e55b4 SHA-256: 5332af295d2740685fca03ad7c74f9f743f7d90cf1507a1b5beb10eff95d3b01
96 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress upload directories. These links are likely intended to lure users into downloading further malicious content or visiting phishing sites. The ML classifier strongly indicated maliciousness, and the structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92e471dc0---23960278592.pdf In PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1f754f413---nowixexunexakoreb.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/ripupese.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783d61496c5---bazufe.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/33102881098.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/lujobezawib.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/zenedadasipedop.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/82755651580.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/8879146356134bdb0c6c38.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/94188340797.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/xowojomokepavaxedemoma.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/bupelul.pdfIn PDF document text
    • http://jerilyndavisrobison.com/clients/870655/File/90542338760.pdfIn PDF document text
    • http://atya.eu/files/file/15767652087.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image//files/36939209557.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/spodtkbr4eaprb73b7b4vpjjac/nojulotoro.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/91l177phr9i2vm3c0o13rnkhge/bavemasogejomuvut.pdfIn PDF document text
    • http://asfalon.com/__files/file/toluwisijosomebu.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700905d3844---zikilosupegus.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/79209492764.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/zapavakeramaxenexegogiz.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/76a2703a93281c3d265be20798a62b63/zizipise.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/77311407771.pdfIn PDF document text
    • https://ridersshop.it/file/65311105235.pdfIn PDF document text
    • http://envigest.cz/upload/file/79402376024.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=jana+gana+mana+piano+notes+with+chords+pdfPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001708a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1708A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000188a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188A1 11096 bytes
SHA-256: 6f151201dbf0ee8b010ab29620ef82f9093d5280415ab410f99f23e111c51063
font_02_sfnt_off0001a22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A22B 1716 bytes
SHA-256: 12cbf7cedc92b83d687cd61962e0e549dd8e8cb3a276abf03b7e3a09280f4f9b
font_03_sfnt_off0001aa4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA4B 21288 bytes
SHA-256: b58aebe4925e10e85f96545e63c374f5e615af926b4caab73092e9f7fc14bb60

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