Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ab63fd4c78dded…

MALICIOUS

PDF

92.1 KB Created: 2021-06-28 02:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 9c049bd32da9b180aa21700810d504d9 SHA-1: bbc6e2b4858c6d2899a5ca3e7ce340b3ef4adf90 SHA-256: 17ab63fd4c78dded1efe3081a7f9e44f77ed47503cb9eac863e31924d4e845d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites, suggesting it is used to redirect users to malicious content. The PDF structure and link farm characteristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855a1491511---duxunituwufixuneluxojak.pdf In PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c1f1f50ce9c26aa236eaa634292b8bb9/10682062745.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/ad7ca1fb163f942136f3c36d5c92a2b3/bojig.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e8743dd1ab890efec974cd30c052eb80/wufedivoxefanozufimoram.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/51524675859.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/50920096980.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608689edb0e6b---77821526239.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f127b45e5---kudaziz.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade09b2faa3---2139435430.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/78613c8694eb8dcc16795b21dd1e4eaf/24914149547.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/44912007536.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/f19ae0aa775e966421775714b0729624/buzifuvav.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/xagunevitigudezodusuzitur.pdfIn PDF document text
    • https://andana.us/files/files/levizekidutebulepijav.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/saluxuzadejisulip.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/35036225546.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc50c610773---zuligenutilebonofepag.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/24695980394.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160838b27dc442---nefigodurexapoxopem.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731e6129282---xukejage.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/867935609.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/wowasosanejafuxotiwab.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fad75cb00---sawivujavosutelelipasewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=7+habits+of+highly+effective+people+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E6 16508 bytes
SHA-256: 8acaf2d9bdc3e52954817ee168bb53125adf3d2a37cecd24f4d9756b49c62df8
font_02_sfnt_off00013e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E72 2476 bytes
SHA-256: 9e66068f7408fdcf011ef1eb05c90253355693887616f61eba9e63f900eaa60a
font_03_sfnt_off00014948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14948 10968 bytes
SHA-256: 34e335da4173d904eaa23a387c2f4c2245092fb563221a326f8a85de4ca0eb12

Open this report in the interactive analyzer, or submit your own file for analysis.