Malicious PDF — malware analysis report

Static analysis result for SHA-256 7101fe9ce6d58bc3…

MALICIOUS

PDF

78.4 KB Created: 2021-09-14 01:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9f4222b293cf9ba52a9fe0c5f820904d SHA-1: 4955a9db4a4bfb7530eef0bbc77f42d5dbd9bbe4 SHA-256: 7101fe9ce6d58bc362d71acc4e1ec7294b31a726943e6d48ecb3f9e8a10aec55
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to external domains, many of which are flagged as part of a link farm on disposable hosting. This suggests the document is designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://synerhu.ru/uplcv?utm_term=taqdeer+old+movie+songs PDF link annotation
    • http://realtor-madrid.com/uploades/fckeditorfile/16282601962.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/3115352500.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/teribovigapod.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/63270417066.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/lifetenewezajewipamirar.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/sirasubetazojomovok.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/96738779361.pdfIn PDF document text
    • https://digireg.sk/upload/fonegunovaduromil.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/14388929120.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/bisovenaganaxad.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210901112539147694dm27esjs0r7f.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/47303293202.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f81b37b80d---29492425710.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/jonoto.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/31412840377.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/29190400722.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137653c5cfaa---pawofasopesema.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/xoneximewifedeguvujevop.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/12585959163.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/51151502244.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/87351065765.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/96451532281.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210905101903214.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_off0000ce65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67C 10668 bytes
SHA-256: 29dfc5ce5a207802ce55aa0c5030802982571e81d48c3a2334b47e28f6661f05
font_02_sfnt_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 17872 bytes
SHA-256: f9e7066d833ce2144af5b9acb54791eaea4cca4327da59a1de191ed0415a62aa

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