Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0a6332d6784997…

MALICIOUS

PDF

84.5 KB Created: 2021-03-19 11:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 71dbadf8c6e971196b8841d79ce231a3 SHA-1: c6f9cbcbf27131484aef563a37e9c887aaaaec72 SHA-256: ba0a6332d67849978101033b0ed90d8c8724eb4fc9bdcb67a4ed13f8e131fd9c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains numerous embedded URLs, with one prominent URL pointing to 'xezojetit.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'calligraphy lessons online'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://xezojetit.ru/strik?utm_term=calligraphy+lessons+online PDF link annotation
    • https://tefegepivovopuf.weebly.com/uploads/1/3/5/3/135311357/5058ab4e3077091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5fef99798689a.pdfIn PDF document text
    • http://jaxaxanukijomel.22web.org/deep_link_android_unity.pdfIn PDF document text
    • http://balifruit.com/spain_chick_corea_flute_sheet_music7rsj3.pdfIn PDF document text
    • http://devgame.design/affidavit_sample_in_urdu8n366.pdfIn PDF document text
    • http://stopnutristrike.ru/manazedewizuhly76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_604e5c0ba11e7.pdfIn PDF document text
    • http://vbnmcxz.xyz/709819626038lan5.pdfIn PDF document text
    • https://didilajuti.weebly.com/uploads/1/3/4/5/134585724/8387336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481988/normal_5ffb0f0dc7cee.pdfIn PDF document text
    • https://butebipibib.weebly.com/uploads/1/3/4/2/134265815/butukekamaw_garunuval_roduginomabub.pdfIn PDF document text
    • http://kekebum.22web.org/73816143134.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/lafanajurerifib-temodi-mupuximi-zorisafamula.pdfIn PDF document text
    • http://bt-management.website/58240858037m9q31.pdfIn PDF document text
    • https://vulopinuvi.weebly.com/uploads/1/3/1/1/131164419/nodumopumajajegis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/interest_groups_icivics_answers_the_potato_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/jasusetorabiritoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b2f12f-c476-4430-ab71-557a1565e173/26967076105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50119bb-6298-4e8e-a138-60d8508a918b/how_do_i_get_the_mold_out_of_my_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/66192282891.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/why_is_my_camera_on_my_mac_not_working.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5C 5088 bytes
SHA-256: 56dcd62567b284ad110c93e4da2d79445f711b6039f4ddbb49795310ffcdd7af
font_01_sfnt_off00011fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA8 10844 bytes
SHA-256: 65dcf6174fe1d585e623431fa8656710392962e6989d82d4bf122ae111024ac8

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