Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de62036fb52639d…

MALICIOUS

PDF

88.8 KB Created: 2021-03-30 14:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bd4f5a15227d2723f56677e645af8b0d SHA-1: 7248de166376ea454112d23a208e4e5c53aac2a5 SHA-256: 5de62036fb52639d5238bac2016bb6b1bf9e3a896a365d333e614c8378a2aae7
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The presence of a large link farm on disposable hosting, combined with a critical ClamAV detection for 'Pdf.Phishing.Trojan', strongly indicates a phishing or malicious redirection attempt. No scripts were extracted, but the overall structure and URL analysis point to a malicious document designed to lure users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=lift+off+test In PDF document text
    • http://korecos.ru/what_is_knowledge_economy_in_sociologyrbnqi.pdfIn PDF document text
    • http://giftcard-sale.store/vixefupajefekubozowajsxlrj.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/xamujebetewuridubemufiza.pdfIn PDF document text
    • http://jarokixepoweso.mypressonline.com/gijaneki.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/agneau_de_dieu_partition.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/49457761726.pdfIn PDF document text
    • http://arfesopt.com/418480561908eh56.pdfIn PDF document text
    • http://extrameets.fun/ged_math_classes_freeu0sfj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_1dd64c51a0894758b4f42f45c356a3ea.pdf?index=trueIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_964516dfcc684b5b92831245f3bf2334.pdf?index=trueIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_e118ddc277ee43bfa4f4b0e1d733c3b1.pdf?index=trueIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_d3e1b50bf4c84d6ab951ccca367c4a1a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38185989-b708-49f2-9697-91a4fdfde6ea/how_to_draw_a_heart_shape_step_by_step.pdfIn PDF document text
    • http://gegapitigiz.rf.gd/buvanenubavometozobikos.pdfIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_351947db92934bcf89e5f4afdfa1c773.pdf?index=trueIn PDF document text
    • https://7abbf572-6989-4614-8246-9d5ba34cd238.filesusr.com/ugd/af841b_ac21e694321644d5abdc2c036db3ea5f.pdf?index=trueIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_a57dab85579248aaaa261c1bf89466f0.pdf?index=trueIn PDF document text
    • http://xogakik.rf.gd/parowazerobaf.pdfIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_247d6476db764cccb12fb59c2fb643eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc13a448-c1af-453c-83c4-43a4f82a34b5/51184601158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567db76b-a900-493b-b2ac-3719f282fc6c/58622179598.pdfIn PDF document text
    • http://vakogez.myartsonline.com/15842785053.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_dc1c3eeaec1b4ba4a5e565509cc0c926.pdf?index=trueIn PDF document text
    • http://nukupotiti.rf.gd/arancia_meccanica_libro_gratis.pdfIn PDF document text
    • http://veramok.rf.gd/broken_screen_prank_free.pdfIn PDF document text
    • http://bemijeranokawu.epizy.com/fenerub.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_cecdf925bee946bfa02f873681de1376.pdf?index=trueIn 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_off00011b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B42 4364 bytes
SHA-256: c3d8fcf45a19083a15ca928108bdb86500bedf937217bd3c3bcf6f096ad75686
font_01_sfnt_off00012a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A35 13256 bytes
SHA-256: babbb79cac4395e45d27b7f4f746c581ab6b1840d7d22d7a2c6ef2133a2fc9dd