Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab7022b763e6e1c…

MALICIOUS

PDF

89.7 KB Created: 2021-03-23 10:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cf9fb3e46023196aef456f7c8fcbcb46 SHA-1: 0e2b33c119a4f4638ecd83a991e6178b8027a7af SHA-256: fab7022b763e6e1c96ef60afa79a5b3c820c1a482e5faed646277fa12fff78c1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary URL, https://lozipotod.ru/strik?utm_term=epson+xp+800+ink, is likely part of a phishing or malware distribution scheme. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan.

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://lozipotod.ru/strik?utm_term=epson+xp+800+ink PDF link annotation
    • http://autolombardpro.ru/legal_and_ethical_issues_in_nursing_informaticshx512.pdfIn PDF document text
    • http://pakepudowo.22web.org/audio_books_for_spoken_english_free.pdfIn PDF document text
    • http://copyrightreports.com/95166997111fwf0p.pdfIn PDF document text
    • http://segwaywheelchair.ru/847697326185vl76.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://5b0ea1c3-b874-41d5-a3cc-49595beb80a6.filesusr.com/ugd/0c63be_b897ca63865843b7895b7bbc46290072.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/63bdf7c7-4cfe-45b4-9048-b0dfaf4461a4/pumumumeg.pdfIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_5a3c523b728e4b759f825ecda21139fd.pdf?index=trueIn PDF document text
    • http://pesipobigon.rf.gd/how_to_negotiate_salary_new_hire.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_9c0351cd49aa4bae9c6d2c5e89343582.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/265adb7f-0560-4de5-bb2f-d63effc2bdcb/ddj_sx2_vs_sx3.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_4063bde4601844a9ae20de6f2a869c28.pdf?index=trueIn PDF document text
    • http://pofizobeje.epizy.com/83402192996.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_4ff428f9fecc4a9d9e6f9e8c4c402976.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c809efa-3bcf-4beb-991e-5b737ec16906/what_are_the_different_kinds_of_nonfiction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3515d6d-7647-4e56-82f5-ca73f33b5ffc/the_haunted_lighthouse_lost_in_space.pdfIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_de0ed1a5456b41498b23298f82452426.pdf?index=trueIn PDF document text
    • https://a867a740-3546-49c9-bb92-c76f735cad7e.filesusr.com/ugd/c312ff_f043a608c04f494ea39ed7f10ad677c3.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_341d1cf4b943487eadc717133b1f1821.pdf?index=trueIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_b26ea51b14dd45ff912109b6949f7517.pdf?index=trueIn PDF document text
    • http://waraposid.rf.gd/how_to_connect_my_dvr_to_wifi.pdfIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_8716de91abef403fa23eb73df838cc9a.pdf?index=trueIn PDF document text
    • http://pepiretivixu.epizy.com/how_to_adjust_citizen_eco_drive_watch.pdfIn PDF document text
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_a1a973d0190542eda3040906d47d6842.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a10816f-640a-4ffd-9f5e-1e8639dcded5/39632333587.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
font_00_sfnt_off000108c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C1 4492 bytes
SHA-256: b40a79a9f1ca0004b6e5ee61a1f20d8c98a38b68bf4f3ce6b31f9e754c5a0645
font_01_sfnt_off000117fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FA 15692 bytes
SHA-256: a5e9f5be9462c1403d8d2b19d436e43a7c56968056e43e733a583b98a38d9bbf
font_02_sfnt_off00014913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14913 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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