Malicious PDF — malware analysis report

Static analysis result for SHA-256 9700648fce536a15…

MALICIOUS

PDF

72.1 KB Created: 2021-08-28 05:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ccf76ecf7009e97be57b667655234f13 SHA-1: 87f8270ce0f7316d56a941af00a7681446cb0a42 SHA-256: 9700648fce536a15c36f303f05db99f64fafe3325505a8f1c9219de78f14c407
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=repetition+in+web+design PDF link annotation
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/5a9d6238719bfb3385d685f40c355f4b/rureniwegejawowaxan.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a219823d23a---35509969305.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/tomikeralokapupubufupal.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c71989c9d08---pomejiramatigupe.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083833d29965---womixesosune.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/bifaxonokojajinigux.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d7e8ab08d---85920756939.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ba240442---daxemekojejus.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1280f0f4d---77258600710.pdfIn PDF document text
    • http://tarasovfabrika.ru/uploads/file/19064334762.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/sesopovamol.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/10518677345.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1a892548e---91489600235.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d65dc80f95c2d59cd7e6df95a93226a2/xopusodesonarejanesovilax.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/uh48i7ci7aligk3vnht0spkrq4/lorajovekomajisivibojipu.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/nunutakivokajororovirani.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/6586567515.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/vdgoa8s182r76mfncqtdp00q90/bebepuzibuz.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/29328353535.pdfIn PDF document text
    • http://vitaminyplus.eu/files/file/tafuj.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/25422542581.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e76ae4d3c---juvezadikijelewof.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a8468d390---58281876642.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_off0000ba80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA80 16212 bytes
SHA-256: c0bd909955322f65bddb21aef1fe1286e291b460af3350242f5e87831fdad86d
font_01_sfnt_off0000e328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE328 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 10532 bytes
SHA-256: 1e5558a44b29120959087e9ab667a5e00ef0cecd4bb5a0a0f88476a644cb12a2

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