Malicious PDF — malware analysis report

Static analysis result for SHA-256 171e99615b49ec16…

MALICIOUS

PDF

51.6 KB Created: 2021-03-23 12:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c5fe2aea5403131e90ae44d84e12afb1 SHA-1: e4672c4fd36411432087eb68fceef5c7359409b9 SHA-256: 171e99615b49ec1680d58386338cb351259e7e5e520fbcbb40ab4db917d9af72
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.7797

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 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
  • 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://golowaki.ru/aws?utm_term=kenmore+he2+front+load+washer+not+draining PDF link annotation
    • http://belplitka.ru/libros_de_minimalismo_gratisvq9oa.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/vagemoguremobatetx8egr.pdfIn PDF document text
    • http://armlur.space/rugaxoxobajibotuzalyr85.pdfIn PDF document text
    • http://islandlandscapesbb.com/99628627990jmjbg.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/72705997955.pdfIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_70de3ea57bd84d95b2041dc00a5393c7.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_20bbdf35761a46dc9be75190699c8979.pdf?index=trueIn PDF document text
    • http://vojuzegi.epizy.com/analyse_the_structure_of_a_text_examples_4th_grade.pdfIn PDF document text
    • http://madulok.epizy.com/how_to_tell_if_caps_lock_is_on_logitech_wireless_keyboard.pdfIn PDF document text
    • http://pijiwir.rf.gd/nivavuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b3a7c0-b20a-46d0-83ff-5b6aacd2fa23/69225075284.pdfIn PDF document text
    • https://2c0370cf-43ec-4dc9-8589-ec1e7793a70d.filesusr.com/ugd/404058_87d58155303b486ea06d0763ddc97eff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3e7b35-4e53-4013-b251-b2ce244f0eef/lovabupuxabulezebiz.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_4e54214356f94e968bd17e69d3063104.pdf?index=trueIn PDF document text
    • http://vewizoxevig.rf.gd/39183724789.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_33c4a4ea96d2493f989204bb8cc707cd.pdf?index=trueIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_e920406140644f4da0eecce5ba1ad247.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce706dd-5682-4875-a434-6e9d2e0754c3/mr.grinch_song_lyrics_karaoke.pdfIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_04d9ccac4c254ccaa30ff5dabd6822a6.pdf?index=trueIn PDF document text
    • http://xotujulenibol.epizy.com/perkembangan_agama_kristen_di_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/mujegifap.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/is_p90x_ab_ripper_effective.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_ed3c0ab189f14273ac467fbfef453338.pdf?index=trueIn PDF document text

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