Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd4c574dd21dee4…

MALICIOUS

PDF

76.8 KB Created: 2021-03-23 09:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9f7c48f195a91ae057712a6eb394259f SHA-1: efb073961b290d81fea361528d51ea425e781aac SHA-256: fcd4c574dd21dee407629681278a4aea96856e8ff556ab8417c39addcd4f1823
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The presence of external URIs and the overall structure suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/123?utm_term=explosion+green+screen+video PDF link annotation
    • http://axecheat1.xyz/wubefuvirutuwesitorarov0rvqa.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/zolowojukoferetotibasojev.pdfIn PDF document text
    • http://termometr-medikal.site/elements_compounds_and_mixtures_poem_worksheet_answersbs4wy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489237/normal_600591a235366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_60551a95a99a5.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/timex_1440_sports_watch_turn_off_alarm.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/what_does_sunshine_represent_in_a_dream.pdfIn PDF document text
    • http://smirno.life/zujejemugokopimulaminedai68rz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vedixemalirugi.atwebpages.com/sivedigatupi.pdfIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_b1ba74c7fa7c4c22986977000f4ac42a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4356bd-c300-467f-abf6-962b1386e732/lukerurobotalogugodinum.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/mafubibonotafubigujukapo.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/zisela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b9d13f-ae0c-4253-b953-fe0c32718848/nancy_drew_movie_2007_watch_online_free.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_1b1b3bb368df4b1c97e4e5f54bc25e8a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b1d331-9c65-4bc1-9f73-33fada883806/gowewobumawom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ffdbc9-1644-4f1e-8f20-f6ecfa50cc67/fluke_1750_default_ip_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa888900-5f5f-470d-a54d-db6139a81d49/national_honor_patrol_worksheet.pdfIn PDF document text
    • https://02274cc9-8b57-4441-be19-e46c089ec46b.filesusr.com/ugd/f11b8f_08d40d9561914cd3825de1bc3ce5c77b.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_off0000eebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 5116 bytes
SHA-256: 1811374f6a7ad78e22a3ddf3c9aa1d986fb8bb8f805fc0b46484ae9bb8a10bd4
font_01_sfnt_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 10868 bytes
SHA-256: d79a41723febb74b79ffe470e83a8f21894c72a7e6077c9d6327d4758ab87067

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