Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a24d753d575d42…

MALICIOUS

PDF

82.6 KB Created: 2021-03-09 18:15:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5d1200f735eaf3f434044daead060326 SHA-1: fe8e0c3ce5c7420c3c45e31f67028ff8b186f860 SHA-256: 00a24d753d575d4243a224fac54dbded095a6c77ca9c765ff892a211397bc899
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The embedded content, though heavily obfuscated, appears to be related to search engine optimization for product installation guides, likely a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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/wb?keyword=uppababy%20mesa%20car%20seat%20installation%20without%20base PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403260/normal_5fd10889ab5bb.pdfIn PDF document text
    • http://supajukiligado.22web.org/69740197881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_602b6fcf81510.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/how_to_use_master_test_kit.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/brother_hl-5350dn_toner_problem.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/harry_potter_quiz_which_character_are_you_beano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_60265f10709ad.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/76746381077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486374/normal_5fe819d70fb5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_c4dd0a940879471da37a7d33af47c2e5.pdf?index=trueIn PDF document text
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_0908c5d7228d46d389ba77183afc080a.pdf?index=trueIn PDF document text
    • http://gazonenewotife.epizy.com/74499324384.pdfIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_289fbae668204294b0cf1b94329efd6b.pdf?index=trueIn PDF document text
    • http://refigiliz.epizy.com/9283969630.pdfIn PDF document text
    • http://zurabogefu.rf.gd/monthly_employee_shift_schedule_template_excel.pdfIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_5979247766fb4038a50b5b63ff236445.pdf?index=trueIn PDF document text
    • http://doriponesarom.myartsonline.com/7038175217.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/5693465108.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_e85125e2df12487fb862925a96aab34d.pdf?index=trueIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_9f27be784e374368ae5cb958f9837eb1.pdf?index=trueIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_117db211fd92405caaf15ba5b2ee0492.pdf?index=trueIn PDF document text
    • http://guxonijelosaku.epizy.com/watch_twilight_new_moon_full_movie_online_free_putlockers.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_14d50a8143cf4f3080c4396e6678d846.pdf?index=trueIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_10f0cd0b434f4d8689f8cb89ae5077b1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AA 5496 bytes
SHA-256: 836bfce9009cdc7698751bccc55bd10f90e821893283a7c0a0f6b29cf738ab97
font_01_sfnt_off0001173e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173E 11068 bytes
SHA-256: ce802774a7e49a64941e1b0b2c7887049915a403aac5dfe72840841c24f6a22f

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