Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d056f9ab164683…

MALICIOUS

PDF

85.8 KB Created: 2021-03-17 00:26:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 843230de338bc0183316a310af51e812 SHA-1: f96d4021014e6a22dde270165406539e04fcd9c7 SHA-256: e7d056f9ab164683cb121ef3918f6d0292ac79277c36700aac15a8ec7dbe6516
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and likely part of a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via the linked sites. The document body, though heavily garbled, contains keywords related to a 'Patrology handbook pdf', suggesting a lure to attract victims interested in such content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/wix?keyword=patrology+handbook+pdf PDF link annotation
    • http://uspeh.icu/20640578892sy59m.pdfIn PDF document text
    • https://cdn.sqhk.co/jiloduvunilu/5Nfiijj/andmesh_kamaleng_hanya_rindu.pdfIn PDF document text
    • https://fefokivaz.weebly.com/uploads/1/3/0/7/130776727/898203.pdfIn PDF document text
    • https://lifitexuga.weebly.com/uploads/1/3/4/3/134356919/b73032aaaa6.pdfIn PDF document text
    • https://mopopapepiror.weebly.com/uploads/1/3/2/7/132741339/6074538.pdfIn PDF document text
    • http://ellmax-site.xyz/how_to_reprogram_legacy_garage_door_opener_model_696cd_bz6hpm.pdfIn PDF document text
    • https://lodikesilir.weebly.com/uploads/1/3/4/8/134868057/nagor.pdfIn PDF document text
    • http://ampinternational.org/91118478928oi5wd.pdfIn PDF document text
    • http://show-visitor.xyz/allen_bradley_1734-aentr_edsvxd9b.pdfIn PDF document text
    • https://gaxipisida.weebly.com/uploads/1/3/4/2/134267022/9b0f528.pdfIn PDF document text
    • http://mmuuue.space/coordinate_axis_worksheetpksoq.pdfIn PDF document text
    • https://detabifaf.weebly.com/uploads/1/3/1/4/131436978/femig.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/g4YMsja/sostac_marketing_plan_example.pdfIn PDF document text
    • http://belkwigs.com/78084047753ikjoe.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/zunuxuxulus-tuwirejutifix-bozarodudir.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/hhcKgeI/7599473710.pdfIn PDF document text
    • http://aov.one/cute_wallpapers_for_computer_hd21etr.pdfIn PDF document text
    • https://zigakenipipoto.weebly.com/uploads/1/3/4/1/134131781/4914877.pdfIn PDF document text
    • https://cdn.sqhk.co/wunasesev/iv09jfT/gt_turbo_car_driving_simulator_2.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://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_e4df5a58cd0f4aadb65b4aca63459873.pdf?index=trueIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_83d6298168dd439cb495426b531ac6de.pdf?index=trueIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_6194b8fc107542d0bb495f6e75b87cc9.pdf?index=trueIn PDF document text
    • https://8e8ef6ac-913c-489f-8395-c30730e7ba0a.filesusr.com/ugd/f39c52_02f153a3ea9e43f2b4a4299f05f3f1e7.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_2b095dfd0ad646848bfc3c04467b9dac.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001072a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072A 5052 bytes
SHA-256: 117417ec35f6082cafa7bea9f12018074f465eef9c264f4f3a3d5a5d38a9cce5
font_01_sfnt_off00011848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11848 10404 bytes
SHA-256: d87bf24502a4a8b3ee3ed2b8339d6d1e8d236dcb08f994d226ac5acb8f6707ee
font_02_sfnt_off00013bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BDA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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