Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e163001153509a3…

MALICIOUS

PDF

74.1 KB Created: 2021-06-24 09:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6a588ec3a43a38b94fb527a5a9f0a3ca SHA-1: 5593afcb5dc69ac16d9ab70f72e6c271911b0699 SHA-256: 1e163001153509a3e4cbfaf8a5ca7c71da0d03d7ec00db47c85bef59136bce79
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, with one pointing to a suspicious domain ('botokaw.ru') that is likely part of a phishing or scam operation. The document body, though heavily obfuscated, contains text related to DNA, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/wb?keyword=what%20are%20the%20two%20strands%20of%20dna%20held%20together%20by PDF link annotation
    • https://fotelosalif.weebly.com/uploads/1/3/4/4/134463398/3120728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459623/normal_6006cce3b9210.pdfIn PDF document text
    • https://bururinuriz.weebly.com/uploads/1/3/4/8/134882015/kutajeziluboto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_60460170ba391.pdfIn PDF document text
    • https://wegebumerovoni.weebly.com/uploads/1/3/5/3/135387929/wuruno-kiwexizanuze-nuvorafibivawes-sazibi.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/mowex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457847/normal_60580a7ae7687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_602ac2a2200fc.pdfIn PDF document text
    • https://minazunanuvisim.weebly.com/uploads/1/3/4/6/134666394/toseditotax-fagegobib-lugadebave.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fujiserefi.pbworks.com/f/wadawugifisadusoxet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/672f74fd-48c3-4382-898e-9de7b0f32d65/one_touch_ultra_easy_reset.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/f/18480204016.pdfIn PDF document text
    • http://pifiloxema.pbworks.com/f/78976648812.pdfIn PDF document text
    • http://mukonisu.pbworks.com/w/file/fetch/144455520/75259639183.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ce7c17090ef86c08cad017/1624144919960/larogalifinujexuwuke.pdfIn PDF document text
    • http://risoxef.pbworks.com/w/file/fetch/144455313/adding_and_subtracting_fractions_with_mixed_numbers_unlike_denominators.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c57862-b6a6-4d7c-946d-6655a903d0ab/noduraneronusuwiwobofebax.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60c9a5500f099759e4cbb881/1623827793144/pc_vidmate_app_install.pdfIn PDF document text
    • http://wuvebag.pbworks.com/f/sozalef.pdfIn PDF document text
    • http://suniger.pbworks.com/f/advanced_excel_syllabus_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60d3c90a8ea4a76ba53878a1/1624492298186/8076768047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b02810-69f5-4eed-95fe-fff0d3765d63/tunum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eecfb1d2-501e-4f2f-9ac7-00abe21c8fdb/canon_powershot_elph_170_is_manual.pdfIn PDF document text
    • http://wedezim.pbworks.com/w/file/fetch/144905226/brawl_stars_hack_mod_menu_2020.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_off0000e422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 5516 bytes
SHA-256: 2bf7f111190c3a820d69c86a38b637536e857abe430f895861bfc9469e1411c9
font_01_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 10380 bytes
SHA-256: d53892b2646044425d044bc6b542a0241f2aaca4a56cff54b5e586727b2d3d2e