Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e29a5f05cfdbd8…

MALICIOUS

PDF

78.8 KB Created: 2021-09-07 10:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 36837d56efd55c391de4badfd30adc97 SHA-1: 46850819eac62850aeec3ae2452fee3ce810c9bb SHA-256: 62e29a5f05cfdbd8c2d6f2d8e15c2e362fceabecc270228444363b97cb3963a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to potentially compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://wisserarm.nl/app/webroot/files/userfiles/files/91384585692.pdf In PDF document text
    • https://webtechnocrats.com/upload/file/zufawawopopisituzosozu.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/15053785115.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/zazuwegi.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093f32471e6a---8330954711.pdfIn PDF document text
    • http://islandpointfl.com/userimages/21492184963.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/62474585315.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/5f904b710959571eaf1acc0d898f0384/mujikifapowapu.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/solefilolarurotu.pdfIn PDF document text
    • https://laser123.com/geektic/files/67057027667.pdfIn PDF document text
    • https://loctra.net/userfiles/file/gebugujisadaxeparaga.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/09fb960401a7a566702610165f9722d7/98777279125.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c162486e73e---74832148088.pdfIn PDF document text
    • http://derma-dts.de/files/file/nozokesu.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/25668262018.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/96109079078.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610743705fad8---20717122887.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/59549171429.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/xitikekexagutuf.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/98192831667.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/dfflvu0iqruheu5ctcu8o6edeb/kelaxe.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/28470490900.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/simixedibumemurezo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=surah+kahf+read+online+pdfPDF 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_off0000c3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDF 22044 bytes
SHA-256: b09462db36a6779d1c10d4432bfa85d25738f767692f415ecd43817d115502ec
font_02_sfnt_off00011551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11551 10596 bytes
SHA-256: 9d8a86ad935a0eebdbefc184881e5249cc4d90f2a4932cd31ec74972721bdcb2