Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb21bf168ee2fcb…

MALICIOUS

PDF

79.0 KB Created: 2021-04-08 01:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 54dce4329e2ee1d4ea63dfa42d6eb1c3 SHA-1: e5c1016b9d9034786e5c1461dcebf200f948dd23 SHA-256: 2eb21bf168ee2fcb77d1fd75dc86628109183f2448602ba602b94d0efac68593
226 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent. The document body, though partially obfuscated, contains a search query related to Xfinity modem passwords, likely a lure to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=what+is+the+default+password+for+xfinity+modem PDF link annotation
    • https://jefamozalubibul.weebly.com/uploads/1/3/1/4/131438275/vajan.pdfIn PDF document text
    • http://requiremcgood.com/throne_of_glass_series_book_1_read_online49bzu.pdfIn PDF document text
    • http://cashbackk.site/how_long_does_it_take_to_remove_a_wart_with_salicylic_acidzxkj6.pdfIn PDF document text
    • https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/57bad926.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/7010950.pdfIn PDF document text
    • http://terem.space/naradimupozerubu1gbsb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501364/normal_5fe04a4b34dda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_604ed56c20497.pdfIn PDF document text
    • http://wdd13.ru/washing_machine_repair_service_costehbu2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453901/normal_6035f7358223f.pdfIn PDF document text
    • http://levelupguild.com/what_is_the_best_brand_of_fridge_in_australiamupo5.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/88bf0b94e406d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_60552dfae7ccf.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://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_34741b1132c940acac9e6a0fe978f8b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85589de-d454-42bd-9537-08cb2a63d810/gipevijugep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee8e1b5-ec34-436e-80e4-a27c722f5c5b/fawolulaledopibajuza.pdfIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_b041119f736743be8e76e95748e8ea59.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfbcc94-19e2-492b-9cb6-8c0e9b6eafde/53772785694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809f727e-c077-4e44-91fe-d329578bbad1/how_to_update_zoom_h4n_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8dca180-2343-48eb-be19-47d02c1564f0/licensed_to_lie_review.pdfIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_e455284c3f844f33b362a50e80b643bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cfe652-4dc0-4111-b79e-8bfbe01e30c1/bowflex_treadclimber_tc100_safety_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32d415f3-8a29-4dd9-89b3-94908ce23f61/ancient_christian_commentary_on_scripture_john.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_off0000e868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE868 5436 bytes
SHA-256: be8799fd04e76d3dc51b2743988b6b5932275d92bbd06dff17c8e9bae4847901
font_01_sfnt_off0000fad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 10900 bytes
SHA-256: 681e5af3f9eabb9bba24e0798b5b6d60f6013ee57826d7981af396adedaebe54
font_02_sfnt_off00012020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12020 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e