Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a224221a8a7cf7…

MALICIOUS

PDF

92.6 KB Created: 2021-08-09 21:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d728bae5234dc0de4a27413f6029e4ed SHA-1: 0daa26aec283fe5209f5404cd6b68f78ab0e3fd8 SHA-256: d3a224221a8a7cf7008c378bfb613c15872a37c9b71da0e344df2ea7af1484d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to direct users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://huntic.ru/uplcv?utm_term=jump+force+anime+mugen+apk+download PDF link annotation
    • http://autofulltravel.com/userfiles/files/53168055834.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/babobixumisoweliputar.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/4j1glmei87truokk9dgq67vh33/66809413169.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/kapedabobafajumerubise.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/5895885882.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/44099617057.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/49706d74c3816be9c7a2533dc46c1413/radofupesaminunazud.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/68372541875.pdfIn PDF document text
    • https://paperland.bg/uploads/file/79071316940.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/10844926663.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a97cf4baa04---bomagitokasagikewagiguxa.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/zuxafoparokunababo.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media//dumuguxepubimojugugej.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28db94e36---78973530728.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/92j6g01d4ciu6o42ve3551kher/zasomepakumaxe.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607005662feaf---69372079936.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/ac337fa22d4cb8804c7c64880c74d7d6/83129623702.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/silutufujidatuve.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/aac3f139c35d9723c1b3e48759b8c759/85218781015.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/movogapaw.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/18a92aa7095e6739ffa767d2e558f944/34003197032.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/tobepiliwokafunasezew.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fe986045b21---vanopogad.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/ed14c6ef608830e8ca6ab19ec301c705/20013404942.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_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001174a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174A 19468 bytes
SHA-256: ab66f7525316bec712976ec8b2bc12f5c655f3a72fc87eaf82352e712b7dbeb7
font_02_sfnt_off000148cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148CC 10964 bytes
SHA-256: 0359b6d75a67783c3f06ecf070b8e71ff9021c35c05cce0916a8c7caa20b54f0

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