Malicious PDF — malware analysis report

Static analysis result for SHA-256 f530a14db540223a…

MALICIOUS

PDF

78.4 KB Created: 2021-06-11 05:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: adbf34ae0eea6965dcf6724319bbabce SHA-1: 55a7266ffd2d2362f6f14886bd25c5c17bdc6b1a SHA-256: f530a14db540223acc13b07b16efdf95551a584eb0354275b6d89682c40d712a
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to link farms hosted on disposable domains, suggesting an attempt to obscure the true destination or to host a variety of lures. The primary malicious URL identified is `https://oniceh.ru/pbw?utm_term=ondu+motteya+kathe+full+movie+download+link`, which is presented as a movie download link, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://oniceh.ru/pbw?utm_term=ondu+motteya+kathe+full+movie+download+link PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5fefc2b5da2ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_600be2f78e8d8.pdfIn PDF document text
    • https://goporurozabi.weebly.com/uploads/1/3/0/8/130874573/nifen_wasewa_bozuxixeregel.pdfIn PDF document text
    • https://jasevumoxemu.weebly.com/uploads/1/3/4/7/134707335/tekinofuwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463794/normal_5fcf1e351ed4c.pdfIn PDF document text
    • https://fuxoneji.weebly.com/uploads/1/3/1/4/131437311/duzolepokigipebojo.pdfIn PDF document text
    • https://meligobuv.weebly.com/uploads/1/3/1/0/131070858/0789d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_5fd9d8034b458.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391037/normal_5ff453be55002.pdfIn PDF document text
    • https://wozovogunetip.weebly.com/uploads/1/3/5/3/135396590/29a0fd2e8554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_60236ccb80575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5fdd47bb97a1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459630/normal_6002c2905bf65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fagizeliwud.pbworks.com/f/worksheet_on_decimals_for_class_4.pdfIn PDF document text
    • http://zobalazaga.pbworks.com/w/file/fetch/144654966/wipoj.pdfIn PDF document text
    • http://gogoporiwo.pbworks.com/w/file/fetch/144665274/anderson_j.d.-_computational_fluid_dynamics._the_basics_with_applications.pdfIn PDF document text
    • http://favixose.pbworks.com/f/how_to_sell_to_a_business_owner.pdfIn PDF document text
    • http://safubudesowi.pbworks.com/f/revert_a_specific_commit_git.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab1e960-495f-439c-bf4d-b83776063ec0/8037305080.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/cuantas_celdas_tiene_un_libro_de_excel_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6d3e4a-92cc-41c1-b2ac-8c51bbf28a28/east_of_eden_cast_australian_mini_series.pdfIn PDF document text
    • http://tuvovazuvezo.pbworks.com/f/action_movies_download_mp4.pdfIn PDF document text
    • http://jabodawo.pbworks.com/f/46443601919.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_off0000f578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF578 5220 bytes
SHA-256: f74b2f3f2da73165f9f6d12506e61959183ec656b34ca058c4ae40bbf7e9bf23
font_01_sfnt_off00010731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10731 10820 bytes
SHA-256: 0083315793fbd1fe505d585a5564cf22e58f79fcc3edb405dfd61d47d5f864bf