Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad9f677e15a83ce…

MALICIOUS

PDF

114.9 KB Created: 2021-03-16 21:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0aa8d666986caff65b50ff42aeb3ff80 SHA-1: e821dff6d6e07f3d1b7190382f4541d28ef207ef SHA-256: 7ad9f677e15a83ce1e329ff7053884c14a9a61b348d479c37ff04b9f69faea94
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, containing numerous external links disguised as search results. The primary purpose appears to be directing users to potentially malicious websites, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ponafet.ru/award?keyword=metro+map+delhi+2020+pdf PDF link annotation
    • http://dazomasuw.22web.org/youngblood_band_sheet_music.pdfIn PDF document text
    • http://hookup668.site/ryobi_airstrike_problemslan5o.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/fHzLJ9k/41965997337.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/haieeNh/naval_frontline_regia_marina_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/hhjcPEN/horizon_credit_union_colville_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/uxhfao0/chocolate_city_full_movie.pdfIn PDF document text
    • http://erogan24.website/domalikojuxutolekiwgpzkh.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/eQZuf7X/grandpa_and_granny_house_escape_mod_menu.pdfIn PDF document text
    • http://sarhello.online/7368696129946qez.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/94fa408b-b651-4b45-94cf-f8152f95c409/excel_vba_find_todays_date_in_range.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_474bd10fa4094d1fa57dbc89f1bf412d.pdf?index=trueIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_0633632451c44c54a0576d773d08b5ae.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_3e27770e05624a5694fb2f9eeb335f2b.pdf?index=trueIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_bef41c6bc4104f2080b888685e1ceb64.pdf?index=trueIn PDF document text
    • http://sodukemesi.rf.gd/21449221363.pdfIn PDF document text
    • http://vutevesofu.rf.gd/kuvanuwurekiferarozav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac00706-dcda-470a-9a3e-2db370df188d/bilodalomob.pdfIn PDF document text
    • http://daloketo.epizy.com/12854583880.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001849d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1849D 20112 bytes
SHA-256: 7fcb44748f89b69237a8c3796dc8323fe41cb7292a5a2f55b62650c3c4956ea5
font_00_sfnt_off00014b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B69 5384 bytes
SHA-256: 61de877abae3a0c1fc5162daeab8cffa3339ca8d9909da7dd108fe537c128b9e
font_01_sfnt_off00015d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D94 11328 bytes
SHA-256: 0621fd9e2e95bff494fecbc0726c19a5f44f31fcaa4cc81748d4a31c9fb9650b