Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b1d02396eb3492…

MALICIOUS

PDF

76.9 KB Created: 2021-04-01 23:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02dae7a695ad5a3af73499a6ee50401b SHA-1: 05dad603d4e678b7e747c9d20fdeab62e5bb44d6 SHA-256: 30b1d02396eb34921a66d8b9258c639042864e72359f9b679d0fa9ba3c0829cf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to unknown domains, indicating a link farm or redirection scheme. ClamAV and ML classifiers strongly indicate maliciousness, with the PDF_SEO_LINK_FARM heuristic specifically identifying a mass of external links. While no scripts were directly extracted, the nature of the heuristics and the presence of numerous unknown URLs suggest the PDF is designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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 http://shtangennstutkupitseychas.xyz/juromibubojuximotakawoirgyh.pdf In PDF document text
    • https://cdn.sqhk.co/wanadujogo/cUgishj/water_parks_open_during_covid.pdfIn PDF document text
    • http://autokenn.com/93967216725bbld3.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/gepihp8/piano_man_album_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/ciithaF/exploration_craft_3d_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/bgjxsla/red_ball_rush.pdfIn PDF document text
    • http://sandiego-podcasts.com/79251101393eaz56.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/ZzjfZwG/among_us_mod_minecraft.pdfIn PDF document text
    • http://ukrinsure.com/48296977769hloej.pdfIn PDF document text
    • http://reduslimitaly-official.website/8093481413npr4r.pdfIn PDF document text
    • http://esclub.pro/retubajutusunobovewiwbzejm.pdfIn PDF document text
    • http://cardioactiveufficiale.site/53643623235xq36j.pdfIn PDF document text
    • https://cdn.sqhk.co/numorolele/KegghcG/bawoma.pdfIn PDF document text
    • http://copyrighytsupport.com/xowanujaxibabegonorubuses29l.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/elementary_statistics_a_step_by_step_approach_10th_edition_free_download577zx.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/3hbSqMG/free_santa_letter_template_to_print.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dRGGkpkNhSI/wb?keyword=donPDF link annotation
    • https://uploads.strikinglycdn.com/files/04254f6e-5160-4df9-9817-264fe496774a/44431244388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fcc78f3-37db-4dfe-81d1-9ce2c0bf67b2/how_to_use_a_bissell_proheat_12_amp.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_c3a4a9588c5a4e4bbe77a225ff3dd453.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df1fed0-1bca-47bc-bc2a-e9f1e8ef0614/momovekiwunojanidit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb9082a5-0732-456c-bf1a-305a2a14a581/xelekosemiwujuwibawomem.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_bec17d5cbbc2452aa20048c906e97d14.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c9ffd8-250b-47f9-8b9b-b3f6274ebc54/89328433157.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_656b9699ca69418a9bfe60e24e84cffe.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_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 4832 bytes
SHA-256: d4ab988c207fe555c6462993c70be8b1460e5cc883264faddf42fdc9ba1b66b1
font_01_sfnt_off000100f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 11364 bytes
SHA-256: 34f3a59018c084e2f628f957ccbbff1a867cfce1c629ae74f97cd71324992b60

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