Malicious PDF — malware analysis report

Static analysis result for SHA-256 7577296a2e467f6e…

MALICIOUS

PDF

75.5 KB Created: 2021-05-30 09:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: db0aac642b58b16dd8976fd9685db706 SHA-1: 11a6b4efb60e708f97418f7427903c6b718a1226 SHA-256: 7577296a2e467f6e6cce1b27a329f374a9e042b55f0c9f01f8025d526874708c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/strik?utm_term=how+much+does+it+cost+to+start+a+trampoline+park PDF link annotation
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/f2afc9e66006a81.pdfIn PDF document text
    • https://tijezelaxupoki.weebly.com/uploads/1/3/5/3/135340387/nimetonenoxefal.pdfIn PDF document text
    • https://gusobukenifoku.weebly.com/uploads/1/3/4/5/134525986/1934214.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/meteji_pumer_tenob_regakixufumetok.pdfIn PDF document text
    • https://kuvegegujumil.weebly.com/uploads/1/3/4/3/134367432/8909424.pdfIn PDF document text
    • https://bafosuronam.weebly.com/uploads/1/3/0/7/130738527/721859e1bef472.pdfIn PDF document text
    • https://wanezevidika.weebly.com/uploads/1/3/4/5/134588498/fd0b7d70ffc8.pdfIn PDF document text
    • https://ludutuwe.weebly.com/uploads/1/3/4/6/134687162/0ed931a.pdfIn PDF document text
    • https://lefipejime.weebly.com/uploads/1/3/4/6/134668800/xurovafuzelimemo.pdfIn PDF document text
    • https://pajilolupifi.weebly.com/uploads/1/3/2/3/132302794/xasadiromopopit_sikawiku_kiponodoxo.pdfIn PDF document text
    • https://wigawiwamenusum.weebly.com/uploads/1/3/5/3/135323889/noguve-loloveniwavovap-xapaludamasegel.pdfIn PDF document text
    • https://xixafaxuxux.weebly.com/uploads/1/3/4/3/134340403/gukulotat_gawiguv.pdfIn PDF document text
    • https://xijogokamu.weebly.com/uploads/1/3/4/7/134721509/suvitakot.pdfIn PDF document text
    • https://lazoseroli.weebly.com/uploads/1/3/5/3/135316949/cb511977bf34.pdfIn PDF document text
    • https://xelopapet.weebly.com/uploads/1/3/0/7/130775154/8639513.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/9a1bfae6-9c87-4f71-b661-7fc24ab50327/kibituloruboviluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3edcf5-3fa3-46ec-8ede-372ee77b137a/fractional_distillation_of_crude_oil_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5b16b1-98a9-4849-ae1a-f115703e8629/teseke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1926895c-e8a4-44fa-a707-495a410b3ba0/5e_character_sheet_app_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c754307-3ee0-47f9-995b-4f9ccb9ae7ed/wodis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394f1248-ccc6-41c3-89e4-fd73f6fe93dd/zojirushi_rice_cooker_made_in_japan_or_china.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2514413-53bb-4f26-9a38-a88f19934126/motorola_xpr_6350_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e99f7612-9a38-4e5e-8ebe-28f29051e3b5/83885803099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6509e331-4fc7-4b9f-96cb-4afc5e7ed999/sinagaxevofasomenelogowob.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_off0000eab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB3 5428 bytes
SHA-256: 4b2a8339f8fde5d722c20b728d4045ed82e0c88bdb754e9af789f00135900fe4
font_01_sfnt_off0000fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 10100 bytes
SHA-256: bde9297f68fae4e236fd22f18583a03f0084a3a4641c02174ce3b8bc4d052772