Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a22e4c0ae4c454…

MALICIOUS

PDF

75.6 KB Created: 2021-06-11 05:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bde99b93111d11e933e85e89e37dd370 SHA-1: dde3ef4733a8b28e9dc0c907688098f91bc54216 SHA-256: a4a22e4c0ae4c4545a2c292c7280c1c717c39f21f807b3faf3ce81ea98d94eab
186 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to websites offering 'Minecraft hacks'. The presence of multiple external links, some on disposable hosting, and a high ML classifier score indicate a malicious intent to redirect users to potentially harmful content. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://allytemp.ru/pbw?utm_term=minecraft+hack+fly+download PDF link annotation
    • https://pururejipe.weebly.com/uploads/1/3/4/2/134265449/808ddf5.pdfIn PDF document text
    • https://sejubapis.weebly.com/uploads/1/3/4/8/134887951/36dbe6c6.pdfIn PDF document text
    • https://mixuzurul.weebly.com/uploads/1/3/2/3/132303374/f1f20d509cf190.pdfIn PDF document text
    • https://wopaxosidavi.weebly.com/uploads/1/3/4/7/134732603/jijexil_lelafe.pdfIn PDF document text
    • https://rixilokif.weebly.com/uploads/1/3/4/1/134109141/jiputalenukexip.pdfIn PDF document text
    • https://kefuvarunif.weebly.com/uploads/1/3/0/7/130739830/3c71daf62c7.pdfIn PDF document text
    • https://nepexinis.weebly.com/uploads/1/3/1/4/131438592/9f6ffe5b.pdfIn PDF document text
    • https://lesopafewef.weebly.com/uploads/1/3/5/2/135293294/dezuruvoloxifebujap.pdfIn PDF document text
    • https://jeziwirumefije.weebly.com/uploads/1/3/4/6/134670599/380349.pdfIn PDF document text
    • https://wimegipovuxu.weebly.com/uploads/1/3/4/3/134373819/nikujomoliwesi-woxofevawes.pdfIn PDF document text
    • https://fotagajumiveba.weebly.com/uploads/1/3/1/4/131411987/6914214.pdfIn PDF document text
    • https://zalevetupuxigex.weebly.com/uploads/1/3/0/7/130739655/bonetetezefusaduke.pdfIn PDF document text
    • https://xakelagus.weebly.com/uploads/1/3/3/9/133997825/joxudafosa_zesasemore_zokifizepob_runezakete.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vazesuna.pbworks.com/w/file/fetch/144660759/singular_and_plural_nouns_worksheet_3rd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b0d3dc-1c25-414b-ab02-216861af940d/hp_printer_7520_ink_cartridges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61fa6367-d8db-448f-9e10-f43d489372b5/first_grade_math_word_problems_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a138aab9-84e5-42f4-828a-a506c4e744d2/xoratimofo.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/f/5226728136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e250b87-d87b-42d7-b6fa-cdfb70f99548/bearcat_bct15_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e97d40e-05ff-49b4-821e-39a0d0f1c4a1/which_pellon_interfacing_is_best_for_face_masks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9187075-206a-4b8e-b204-e27d8bbaf361/what_is_realtek_high_definition_audio_driver_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ae1b3c-81fc-42e1-8f8e-bdc6b764268e/bissell_spot_clean_proheat_pet_troubleshooting.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/w/file/fetch/144521496/evil_nun_1.4_3_outwitt_mod_apk_download_link.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_off0000ea67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA67 5196 bytes
SHA-256: a6bc4017c6c8f76d7e243f2f5ff83521dca8bf26753eee512a4cd44c2a0c1c95
font_01_sfnt_off0000fc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC31 10892 bytes
SHA-256: 889b919baf989b8a8da7c05fde6bf7bdd9d0ca7c296da2162b6be3070f8a5359