Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb02266c1b2eaf50…

MALICIOUS

PDF

105.2 KB Created: 2021-05-12 13:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f1081bc8838955700e8ab7fbdce70be9 SHA-1: 8762eac4315284082b4e70883806e877d2cf2192 SHA-256: eb02266c1b2eaf5053bf7c4341a6d0ac10aa53f5ce1696f03791ef2ae650430e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to 'America's best history timeline 1870s' and is generated by wkhtmltopdf, which can be used to create deceptive documents. The presence of embedded URLs further supports the attack pattern of luring users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pelibifir.ru/strik?utm_term=america%2527s+best+history+timeline+1870s PDF link annotation
    • https://cdn.sqhk.co/daxerarugak/ViigjK8/7267746745.pdfIn PDF document text
    • https://bizutimuja.weebly.com/uploads/1/3/3/9/133999747/midolewuragaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410000/normal_605354982db00.pdfIn PDF document text
    • https://tizukusijevawus.weebly.com/uploads/1/3/4/4/134454617/pemogipew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_60170931a6e1f.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/cgchdyQ/run_sheeda_run_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisezepemu/yyjfkCp/jawetikudadujuzumewajiwol.pdfIn PDF document text
    • https://vinovubetiloj.weebly.com/uploads/1/3/4/6/134679092/wotoromufi.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/hdo9gjM/emergency_alerts_iphone_not_working_verizon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_6045eecd53eca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448100/normal_60337943ba121.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/sozedosumolanej_megufutijavexi_rivakopomixoro.pdfIn PDF document text
    • https://wapubepedud.weebly.com/uploads/1/3/1/4/131455956/raroriwijiz.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/hUXjcib/86803677848.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/eQqfidW/woluresirotometizan.pdfIn PDF document text
    • https://cdn.sqhk.co/liralimujote/ahfhjjc/6794336124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bb5e896e-c857-4076-8c4c-5a2d7cf12ae6/25405496196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45a5baf-afd8-4c02-8b45-03f061296b75/the_school_for_good_and_evil_book_6_release_date_australia.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_7955a96b038546aca1936dc9e0b8c34e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07114a4d-079c-46d5-8f45-3e3a7e334a42/you_cant_take_it_with_you_playwright_crossword_clue.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_8af463b904c844949be783ce6fa0d46a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76acc488-3282-45ab-8ad7-64bccf74b2b0/rogoxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e4fc378-2e46-43e1-8058-eeeb6da29bc4/dewey_decimal_system_chart_for_elementary_school.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_2bd5d34f3e4b4fcb84194a246394098f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA3 5560 bytes
SHA-256: da698c5ca9545ffdd32c5046711128bcf785c5bff92abdf5fd250a5c6bf0821f
font_01_sfnt_off00016165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16165 11656 bytes
SHA-256: bad4ffe65db614849e890e9c015d1afffed83b21efae9c998527472004d3d418
font_02_sfnt_off000188f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188F6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34