Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7f00c22d1937d5…

MALICIOUS

PDF

71.0 KB Created: 2021-09-28 01:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 41d6f9058a8fdb21304b58a144482a66 SHA-1: d332f2642ded5c5a84a67aec1df4a4b7dd6e616c SHA-256: 0e7f00c22d1937d508b0ae6e51820d4d8dbf9c6c45a040a9e88c4c86dcb34969
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The ML classifier strongly indicated maliciousness, and the heuristic firings suggest this PDF is designed to redirect users to potentially harmful content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://laborke.ru/uplcv?utm_term=csr+classics+money+glitch PDF link annotation
    • https://ruh-center.ru/userfiles/file/22684928768.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145f6257372c---kodideko.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161315a967fca8---30971848514.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/zebogalomuzizofoxuwowu.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/wexaxeginupabareropad.pdfIn PDF document text
    • https://gameclub.by/uploads/files/11094835855.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/tuwidaperagonigotog.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/lcvk887hdmffh2me871591nfqu/zotukawimituj.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/kovonafovamuzoxovubaros.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/72716752027.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/85853662829.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/sevil.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/26688219112.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/20219141224207639.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/63543708758.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/xemadufogujemuv.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/36236142.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/tekog.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/kisoxapunukutawon.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/poraromoxadipivemem.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/kobumeded.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/tajati.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/xenasej.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/vegotudexefijilujujakegu.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_off0000b2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E8 10820 bytes
SHA-256: 9025fe0115b02f5ea7aa7e148da61e51e311e1b9adbd59af43075b97ff0beaa8
font_01_sfnt_off0000cbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB1 16688 bytes
SHA-256: 78ebba4179124bc8fea18b381e432c5253caeeb038d4d18a379d8d6e74b3f100
font_02_sfnt_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1