Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2cb3aab7f2631d3…

MALICIOUS

PDF

71.1 KB Created: 2021-03-10 03:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5d66b0b1fa8fd45744e3047aac89bcf9 SHA-1: dd3c7b73708c237ee6da3876bc52bdcf0a09036f SHA-256: b2cb3aab7f2631d383dbe98c0ce9d14a766da0a9f07ebae96c43fb43f4dd2330
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://yafferge.ru/wix?keyword=uf+internal+medicine+residency+program In PDF document text
    • https://maxanijalezo.weebly.com/uploads/1/3/2/3/132303118/ef3cdfd163b13e.pdfIn PDF document text
    • https://jutonoxefakevuw.weebly.com/uploads/1/3/1/4/131454335/luxuf-loneko.pdfIn PDF document text
    • http://neriwor.medianewsonline.com/49502631020.pdfIn PDF document text
    • http://pelinebaj.mypressonline.com/11726253540.pdfIn PDF document text
    • http://puwobero.22web.org/99411248490.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/512037.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/2020_porsche_cayman_owners_manual.pdfIn PDF document text
    • http://nagesebaz.iblogger.org/delicious_emily_honeymoon_cruise_full_apk.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/6535a435-fad6-43ca-8245-18653abf4fe9/how_do_you_fix_the_error_code_on_a_hot_tub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d073ac-0942-4e46-9a63-b99ab5673413/dabepopujajudiderid.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/lolidijesatidodedi.pdfIn PDF document text
    • http://pezamax.myartsonline.com/ratigapidilakigobexo.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/maxixatalijij.pdfIn PDF document text
    • http://tovegini.epizy.com/hp_probook_6470b_laptop_specs.pdfIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_aa42e367e1bc4648ae3a94894364945e.pdf?index=trueIn PDF document text
    • https://05790d5e-93e9-4545-bcc4-99c37f081c18.filesusr.com/ugd/bff4d5_0b67fffff25b4d998e7052437e60c585.pdf?index=trueIn PDF document text
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_2260296a0e1448ddb3e013bd524d590a.pdf?index=trueIn PDF document text
    • http://xeroxuzowi.epizy.com/99089016136.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/wufutisizijigunitumul.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/47512830338.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/bike_racing_game_hack_mod_apk.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_af7a814591744ffcb244e8064c212a49.pdf?index=trueIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_ef900352364b45f8b2bde52920cda543.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_off0000d913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD913 5568 bytes
SHA-256: 59f8023c8e9fc5cbdad9daed8546e6e737f80b61ea4cd79f8d34cb5f122648c2
font_01_sfnt_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 10252 bytes
SHA-256: 8a82de6c6e9e57a5504504d9063fe064836577cfc51d4cf302911dad96fb1ee9