Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a096f55411e6d90…

MALICIOUS

PDF

76.4 KB Created: 2021-06-05 05:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a85505469f10315ae59163dfec9b983d SHA-1: 22c83d7aa980e6b0f9781802114e828f13782c5d SHA-256: 0a096f55411e6d908bb97404030bab699441c8c0ce7124cde51d8870e94bb743
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which point to disposable hosting, suggesting a link farm or phishing operation. The embedded URL 'https://nomylo.ru/pbw?utm_term=functionalism+theory+in+literature+pdf' is likely part of this malicious infrastructure, attempting to redirect users to potentially harmful content under the guise of academic material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nomylo.ru/pbw?utm_term=functionalism+theory+in+literature+pdf PDF link annotation
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/8207807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_6037dda04e0b3.pdfIn PDF document text
    • https://tofikopu.weebly.com/uploads/1/3/1/3/131381225/ebe716348b84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380682/normal_5fca8614d16a7.pdfIn PDF document text
    • https://dukuvewag.weebly.com/uploads/1/3/4/0/134041028/bawefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426413/normal_60392733c7f48.pdfIn PDF document text
    • https://lajoreruxox.weebly.com/uploads/1/3/4/5/134588124/8357304.pdfIn PDF document text
    • https://jidegumot.weebly.com/uploads/1/3/0/7/130776526/tepolokovig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7921c7f3-f24b-42e9-a0a1-cc7c4b318c73/slopes_of_parallel_lines_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1bd553-a4ad-4566-b254-c94a82866fef/td_jakes_crushing_book_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/026b0106-c337-480e-a1b1-3775909f750f/lavavokiwogufugenut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82fe6840-7c7d-48c0-b8c4-f3a6941cc1c4/aprende_ingles_cantando_ed_sheeran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32a3b28-db7d-47e8-9223-b1966546ca01/how_do_you_connect_a_lexmark_printer_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da09d1a3-5f03-42e4-a98b-dba05c601b8b/bally_slot_machine_repair_forum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae745400-85ea-4b2e-a2cb-0b83bdd714e2/five_nights_at_freddys_game_playstation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1beafe-8dc8-4249-8d2a-d363384eda73/75019382542.pdfIn PDF document text
    • http://zixereves.pbworks.com/w/file/fetch/144645321/29308000183.pdfIn PDF document text
    • http://pezaloribed.pbworks.com/f/86457623542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd180be6-c0d3-4647-bfc2-206d4da2e1d7/broan_elite_range_hood_fan_not_working.pdfIn PDF document text
    • http://fagimox.pbworks.com/w/file/fetch/144497064/75032685685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67c08fa-23ee-4213-a656-8f0dc6d4cd20/que_es_nivel_educativo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/751a793c-20ba-4d9f-bcdd-b7dd81c91b85/parirok.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144451992/gijewisideruratoguxezumuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28fd9dd5-2511-43a9-97bf-fe8056c0fffb/38946309137.pdfIn PDF document text
    • http://jubujefaj.pbworks.com/f/93169301795.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_off0000ecf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF1 5452 bytes
SHA-256: 9ef37e7aa331a5fc97adda558b9cba4facee0b2f7f4bc4216587b7f8f9ed189f
font_01_sfnt_off0000ff5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5D 10704 bytes
SHA-256: ef828d41f9043f0861ac8e2481d7866503dc27157904b614e9513cc156ff2239

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