Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacb8a676f1f64e5…

MALICIOUS

PDF

88.5 KB Created: 2021-09-21 02:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b1ab2aa93deb8003f09cfa53b3d132c4 SHA-1: c74df5592f759aa74a892c43d9355edf43b86efb SHA-256: eacb8a676f1f64e58b7fdf6dfe0e97bc337ce93024fef62cfbc1ce618f9809ef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the numerous extracted URLs suggest the document's primary purpose is to redirect users to potentially malicious websites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate these redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=watch+movies+with+friends+online+mobile PDF link annotation
    • http://househouse.it/userfiles/files/83269477759.pdfIn PDF document text
    • https://andhimazhai.com/images/files/farukidobobojujupixixiziv.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/pelum.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/bonud.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/2499847456.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202194151016307.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/ganawira.pdfIn PDF document text
    • https://brakos.it/file/gubutasufavufikog.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/xevalij.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/sorene.pdfIn PDF document text
    • http://eastwoodfamily.net/userimages/42898817293.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210902172232.pdfIn PDF document text
    • http://master-stroi76.ru/userfiles/file/37364673242.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/61460980155.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/favibaxefaponikuzi.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/mireko.pdfIn PDF document text
    • https://maria-galland.ru/files/file/84862696508.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/kunamusukamegaxamat.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jipusefusamev.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd205b6ec8---24135861817.pdfIn PDF document text
    • https://onderhoudnlgarantie.nl/upload/file/sodekodew.pdfIn PDF document text
    • https://mangallagn.com/images/file/kijisutuxesiw.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/86105062296.pdfIn PDF document text
    • http://spreewaldpension-luebben.de/meineBilderAlbertGrundschule/file/zogorebufalizobipamaxire.pdfIn PDF document text
    • https://serka.com/serka/upload/files/kovukipiwovobazulige.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_off0000f5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 11028 bytes
SHA-256: 4e64edf630e80413c4f3868add161cd413628b90891c0a749e4d8dc55482680e
font_01_sfnt_off00010f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6B 17596 bytes
SHA-256: 00b4ef71ee11dbdca2e8337d1e573261634644800af5e826d9f84769606d5f40
font_02_sfnt_off00013ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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