Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a44247de90fd9e…

MALICIOUS

PDF

109.3 KB Created: 2021-03-28 13:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ae1a27a6a7f397024aca2ceb8eef8962 SHA-1: 1af9a8cedae1004df8b8b580e07b3c47aa79fc63 SHA-256: 63a44247de90fd9e9b620873feef089336ec8c9f4c2d4b5f881ec2196c368bb4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://zajinet.ru/wix?keyword=ge+v100+service+manual PDF link annotation
    • https://cdn.sqhk.co/zulatobi/bliaFbm/frontline_commando_world_war_2_mod_apk.pdfIn PDF document text
    • https://xetomulezaze.weebly.com/uploads/1/3/0/9/130969551/boxutefewero_togigawegot_wudopovojopus.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/ZC3hcbJ/msx_mighty_battle_skin_panic.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/369153179452iwnc.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/ateroma_articulos.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/YR5gjjd/dwell_synonym_slang.pdfIn PDF document text
    • http://serviceforyou.site/693134444969mw20.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/zusoledamoj.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/jufxMu6/totijidukewuba.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/kobutawesujiw.pdfIn PDF document text
    • https://nokogijesa.weebly.com/uploads/1/3/1/4/131452879/tamawezijiruro.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/giborogupimigoromo.pdfIn PDF document text
    • https://korebamo.weebly.com/uploads/1/3/0/7/130739662/54ebd3bfdd.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/4eba86eb9.pdfIn PDF document text
    • https://cdn.sqhk.co/fakozunada/U1Kheih/fireboy_and_watergirl_2_hooda_math.pdfIn PDF document text
    • http://madewithsunshine.com/wogidemtcjlt.pdfIn PDF document text
    • http://tamasolesodaj.mypressonline.com/wanusunesipalizoduxezivut.pdfIn PDF document text
    • http://kojanusipesipe.scienceontheweb.net/62257481532.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/085a9d50-173f-4528-b84d-98b1d2e24066/57357436821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/006d61e1-4b3e-40d8-a32f-122a97ad11ae/nemesis_board_game_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/083644b3-540f-4494-b9f8-eeba39eeec6f/fududibaderi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5025b559-3774-4653-bc67-ab3acb5e7b3b/what_is_the_focus_of_health_psychology.pdfIn PDF document text
    • http://sonarubitexo.atwebpages.com/jupuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f4a909-7905-403a-b2d8-baa285df3bc2/d-link_dir-825_reset_admin_password.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001624c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1624C 1876 bytes
SHA-256: b966be133cdde7ebd96e228a865a600cbe425bcac49c58eb68af4780951a6e64
font_01_sfnt_off00016b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B74 5228 bytes
SHA-256: 0b294d1f1d2b9aa251fff1e4d90ee787f3897814a241fcfbcb7b2bf6e46a91f5
font_02_sfnt_off00017d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D31 11812 bytes
SHA-256: b72f0489c8300ccaec7cccc0439a80ee920b0b40023b1439e4cff807cb2c7574