Malicious PDF — malware analysis report

Static analysis result for SHA-256 d470607b45ea7d52…

MALICIOUS

PDF

70.8 KB Created: 2021-09-29 02:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 40975ae10bc75139d7b7666cd2d1dee1 SHA-1: ab8582b478c81d424b51a4ac9d5d7511e3ce6dc4 SHA-256: d470607b45ea7d52497a63b7beb354f00706d484419cd6aae857b639a9841bb5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the nature of the URLs suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://crewmak.ru/uplcv?utm_term=pixel+car+racer+hack+pro PDF link annotation
    • http://oecschool.com/userfiles/file/57408672746.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/67338326312.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/72992876066.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fbef234ea---dotegodisiruxeruloxi.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/9d3n4nknumievb7jia2e5qdbm4/siraxiso.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/wasenamojusigonigimimab.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/sixox.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/8003891841.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/zusisupol.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/74aaa5b7d33c8ebeb90ff4feca6a6546/bopovikilaferuniji.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/jopepidowibonibegel.pdfIn PDF document text
    • http://0932018255.kad.tw/kads/ckfinder/userfiles/files/befaluga.pdfIn PDF document text
    • https://ijp2.com/contents/files/19745312332.pdfIn PDF document text
    • http://shahgrp.com/uploads/36886099125.pdfIn PDF document text
    • http://355353.ru/userfiles/file/zuketikopiwitaxus.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/6046698292.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/besema.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16146d6683f474---34266404020.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/pewomokal.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/jitalimasivomejo.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/kevixivi.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/kivep.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/61072440888.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_off0000b095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB095 17392 bytes
SHA-256: 8096e91c8d2652a192806945a56a311f0c817bcff7493fd00ffe7a3e97c5f2b7
font_01_sfnt_off0000dccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E3 10296 bytes
SHA-256: 5febcb85a898f16bd462c81842c0968c826c9e913e999b7348ed005a14a109e9