Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb895acfdc3ff7b3…

MALICIOUS

PDF

84.5 KB Created: 2021-08-31 11:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2954024b9cd01bd36153b3d195219c3b SHA-1: 127022fd8801a15acbec78a98702a74daecf4a65 SHA-256: eb895acfdc3ff7b3fb58ac955e97943f8b70aadf81953b18070a272b0900f1c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to phishing sites or potentially download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://chrmglobal.com/userfiles/file/3590523344.pdf In PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612704a3d1a61---sazafadasexipepuwexefe.pdfIn PDF document text
    • https://healthtecindia.com/userfiles/file/15422196218.pdfIn PDF document text
    • https://htchninc.com/d/files/jevaxefamobutobe.pdfIn PDF document text
    • https://coil.hk/upload/files/23744312054.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/74849485525.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/21900140877.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/kakifaxinaweje.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f34bf97cfa---logexafaxogug.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/f0jfdsomkdt2s9h4tjbbd2rue2/77310501810.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/9155823201.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/40182112765.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f78fd670f1b---bipexarete.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/4232796066.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/88491153427.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/janowesemimiwibutaviru.pdfIn PDF document text
    • http://ropesadventure.com/d/files/81231677457.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f2048c51c9e---nukulaxudodeke.pdfIn PDF document text
    • http://whitepurdeespires.com/clients/b/ba/ba703c466af5784ee38134b9d09df413/File/9091308872.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/fcdf860d6b3f9f3b9d4a31dd80ab2c09/55901543909.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/sudawegitu.pdfIn PDF document text
    • https://gamepinleri.net/calisma2/files/uploads/tezumefepivumakamarakugax.pdfIn PDF document text
    • http://cfacgroup.com/uploads/FCK_files/file/95783165932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=what+colleges+are+good+for+pre+medPDF link annotation
    • 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_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 17876 bytes
SHA-256: 03b02beaacf27be5cc78ac8c92847e2a31392eb1fa759812b8b79ef1bf857fa8
font_01_sfnt_off000112d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D4 10864 bytes
SHA-256: c4a32fbe1410107b00153660586d1d0062dd3886ec610455ee08c5a76497e632
font_02_sfnt_off00012bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1