Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d070f45f4778b8…

MALICIOUS

PDF

86.2 KB Created: 2021-08-04 09:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a69f8d4e5f784c943174f3564ff156dd SHA-1: 104b17a321a1924c347427dbc9a36fc5bf0136ea SHA-256: 43d070f45f4778b8642c4bfdeabc668cb71be765e8fd65abc047ef8de27ff3b8
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations or disposable hosting. These URLs are likely used to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chcial.ru/uplcv?utm_term=what+oil+does+2014+ford+focus+take PDF link annotation
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/qfj4fkqhtfoq1ge4526e0gfud4/73659569354.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b08ad127089---32000590905.pdfIn PDF document text
    • https://service-panev.com/userfiles/jogiduvenojotek.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609156439c76c---5144302623.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210705233020_ww6yzx.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/8a343afddfb247dc899a4fb22d2da8c1/78337196951.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/88049839533.pdfIn PDF document text
    • http://malifer.hu/upload/file/gosadefunorudobawixovibog.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/64917568047.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/monirikip.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/f8rcfn89bjg8dlrempm6qr345f/zuribidokag.pdfIn PDF document text
    • http://cathayred-csr.com/img-cathay/files/betaweraxemoginubusiwefa.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/18562550590.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/sufolalirup.pdfIn PDF document text
    • http://www.520amis.com/upload/files/kozowoxafenesulaxedavogaj.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e42c169fc---2692381737.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608119d876750---80078736815.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2bd4038fd---kuzojezebifegu.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/aveh9b69ncleqen46q91fglijs/46132795925.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/7jmiogad7j4dvgqkvj531385is/72092570248.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/1b04ae8f860f04f40ac6501d626333aa/fewikev.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/88b3e7c8e2de2d5fb88372282243ccbd/modixejobubu.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/mafikerisavovixek.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/xetexomezagurex.pdfIn PDF document text
    • https://nevisnews.com/userfiles/wipepe.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_off0000edf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF2 11024 bytes
SHA-256: 793b048414e50165c8ced9ba97cd804384dcd93f7d58af3df407ca7fc70e0b17
font_01_sfnt_off000107e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF7 16444 bytes
SHA-256: 5e5277234dd82b1bc1b48b8bd387622a94be0052eeb9216b62a6ac98f83bf60d

Open this report in the interactive analyzer, or submit your own file for analysis.