Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c75cc182709be9e…

MALICIOUS

PDF

82.1 KB Created: 2021-09-19 07:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 19b1de5e64914af802d9d90662423fcd SHA-1: c2ebad140a2b81afc10f5ed42938f1f0906422d0 SHA-256: 1c75cc182709be9e33426ced58cb9dff320669e0bcc23d16dd91463d118b9eec
196 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing users to open a password-protected archive, a common tactic to bypass gateway scanning. The presence of external URIs and link farm characteristics indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=new+super+mario+bros+wii+iso+torrent PDF link annotation
    • http://queensparkview.com/image/upload/File/wodof.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/zadipemezevunageziwusu.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/sijilutodasunebebinat.pdfIn PDF document text
    • http://shanghaicruiseparty.com/uploads/file/43795236134.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/6883378394.pdfIn PDF document text
    • http://tradotel-riviera.com/file/setizofijokof.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210905025333.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/67185760609.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f44fd72106---26993755913.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210909_212835.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f55c4c6171---5608478250.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133ddb8513f7---6187430577.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/80966067200.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/0fae7165f452711fe600d96831087242/4273768907.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/34312525568.pdfIn PDF document text
    • http://agilesolutions.in/uploads/wobamiwofu.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109170443534071.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/ac20c775753124a3cc44371af88f07fe/98592721053.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/fepewure.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/gedasuj.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/92376983781.pdfIn PDF document text
    • http://szcftz.com/upload/foroxizulezefuvuvuminow.pdfIn PDF document text
    • https://easyown.ddproperty.com/datas/files/89806111390.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_off0000da1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1B 18304 bytes
SHA-256: 518f1232f3a3600c39965270bf3edd42f99d0e87711a393698e446371914008a
font_01_sfnt_off00010a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001223a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223A 10672 bytes
SHA-256: 1c47d3dbccda5cb1afed2123a2832d1ddab6d99d385455648e1f05666ebd322e

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