Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d01eaea2a94b0c…

MALICIOUS

PDF

73.9 KB Created: 2021-09-16 11:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 8f95114ffd086e4c898a5f210c315687 SHA-1: 72a13f372f23378d62aa8c4b035098e1c8738ca8 SHA-256: 60d01eaea2a94b0c41fea77645a6b9e651bc5e4392366df56cadd4aa56e02446
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=tactical+war+mod+apk PDF link annotation
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b08590cdd---zatulawipizorogu.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/u9oasr37kpaq72cehpor6vbi40/64851340010.pdfIn PDF document text
    • http://ustunongel.com/image/files/baromokerewebavoruze.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/79525788233.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/wedige.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/56778914856.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c14f2865ba---53125297196.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/lixetopaxuzevaratosemo.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/bajebazutilovatafusasi.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161323e6c44e95---mosefapimujijutuvo.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/53251800364.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/rilegabukil.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/zobuz.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/kogafitenijadenujumukas.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/b14a36cd99fc98652607b7c7ab6cc720/walexebujagizegakowumeveb.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/tivozipebasaxokibisitipo.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/judeduzomoxijapano.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/kezilosolerumovoze.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/8740232555.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/89167337559.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16134f6839a85c---35122319589.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109100721549293.pdfIn PDF document text
    • http://maybaobidinhdinh.com/upload/files/gixeruputijekobeze.pdfIn PDF document text
    • http://krcatikyonetimi.com/userfiles/file/weralumusorimevenagar.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/51484501774.pdfIn PDF document text
    • http://imaginove.eu/data/Files/sebuzubizivusowigozaboxe.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/56709975034.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_off0000c0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 16188 bytes
SHA-256: 47516663333da0c534d68c2eb0b5413e23fbe72266137e762a1f952d0dd4eb3d
font_02_sfnt_off0001026e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026E 10412 bytes
SHA-256: b4f50a21a21f9f4f4d261ca3b96895b1e8fe015bad97a133e8561e620b0289ab

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