Malicious PDF — malware analysis report

Static analysis result for SHA-256 e424dada3dd69fac…

MALICIOUS

PDF

75.0 KB Created: 2021-06-07 15:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2f6db4f41f3212195c7650783edea896 SHA-1: a9d081e815ed8720ab67bace62f6e3655f288f20 SHA-256: e424dada3dd69fac10661ac23c99caf76dfbc090553c436ef65c1078f4074ac1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified as a link farm, with a high ML classifier score and ClamAV detection indicating malicious intent. The document body, though partially garbled, suggests a lure related to a 'quest guide'. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest this document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://allytemp.ru/pbw?utm_term=scions+of+fate+quest+guide PDF link annotation
    • https://mitavubadez.weebly.com/uploads/1/3/4/4/134458848/6f8700b102.pdfIn PDF document text
    • https://zukezima.weebly.com/uploads/1/3/4/3/134345014/3954861.pdfIn PDF document text
    • https://zapodebas.weebly.com/uploads/1/3/1/4/131437158/gagisipog.pdfIn PDF document text
    • https://bexaxasoves.weebly.com/uploads/1/3/1/4/131438242/vatilejo_povofamilikota.pdfIn PDF document text
    • https://lonapumerupa.weebly.com/uploads/1/3/4/8/134853684/01dc3874245.pdfIn PDF document text
    • https://peminikagi.weebly.com/uploads/1/3/1/8/131856713/sufebaxo.pdfIn PDF document text
    • https://kuginipa.weebly.com/uploads/1/3/4/8/134853520/4aad33b5ef836.pdfIn PDF document text
    • https://nelubetif.weebly.com/uploads/1/3/5/3/135322580/5299357.pdfIn PDF document text
    • https://navolujute.weebly.com/uploads/1/3/1/4/131483334/duwanafogutupo_xeriboxovejabo_befipomilot_nuzonevitew.pdfIn PDF document text
    • https://kazagito.weebly.com/uploads/1/3/4/6/134665665/wavutijireb_weruriz_lexigeseka.pdfIn PDF document text
    • https://vovavurag.weebly.com/uploads/1/3/0/7/130739927/de550a86c55f531.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3b08f6-ed16-4ea3-936c-fe6c95f96ab0/86660358154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec5c574-41f8-49b1-abdc-da12ef658a5d/funlux_security_camera_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f4b06f9-d889-47cf-9f90-2e197cd26f20/baby_jogger_city_mini_gt_double_bassinet_adaptors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b1a3703-bb66-4379-a98e-c3bb209167a1/71255689965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75af831-823c-492d-a8d5-28bc50779a2d/do_class_size_matter.pdfIn PDF document text
    • http://zikasamu.pbworks.com/w/file/fetch/144471054/worotifubelugisikixid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/755be987-532f-4b9b-8b7d-3bdc2cca7cb6/jomofarojopiwubikowo.pdfIn PDF document text
    • http://misabovu.pbworks.com/w/file/fetch/144570861/fozarafumaxanugezujaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b2dc09-201d-4d01-b78e-a5545bb5be39/xiluzisidulozefes.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/f/31855408539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce12ee5-16ad-4828-a46c-bb614c353149/51032458136.pdfIn PDF document text
    • http://gatunam.pbworks.com/f/kabexet.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/w/file/fetch/144496848/ok_ok_telugu_movie_online.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 5288 bytes
SHA-256: d171f2f1e06d40ed2e98fc39e4fac27a7b97613bec8614e3f7510314c17e5c92
font_01_sfnt_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 10920 bytes
SHA-256: 0f683e80addc844b816dc19e2e77a1132c1c96c3c6e4fa2099fd9a925f06c925