Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6262ca60262e06…

MALICIOUS

PDF

150.1 KB Created: 2021-03-31 12:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 917f1dc6250dfd66c829cbb2af55f472 SHA-1: fb86600e0bb39d89eab4be6dbadb84bcfe44a7b8 SHA-256: ef6262ca60262e069e16b03a182a17c066680e66115b613ef9e9d8d1d3a5e614
224 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • 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://yafferge.ru/award?keyword=allen+bradley+plc+programming+handbook+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486751/normal_5fdb755c6eaa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379848/normal_5fec86693eecc.pdfIn PDF document text
    • https://dadekojulaza.weebly.com/uploads/1/3/4/3/134320805/pugovijiriwoveg_texalifem_merelegi_zusukufov.pdfIn PDF document text
    • http://gilezasewanima.iblogger.org/wizaku.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/todimuzajore.pdfIn PDF document text
    • https://dexajuvado.weebly.com/uploads/1/3/4/4/134470202/80830c75126.pdfIn PDF document text
    • http://kabuzajo.22web.org/simazef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_6052b441044a6.pdfIn PDF document text
    • https://gideturifit.weebly.com/uploads/1/3/4/8/134887905/dejavoxek-luwujiverorigi-sitajopum.pdfIn PDF document text
    • https://bokasopuvozanib.weebly.com/uploads/1/3/4/3/134319525/kepepozibebam.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/cd033564-2b09-458d-9473-cab4c4707921/lamagobogelofa.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_17881bfd935b46e3b9dbab81265d3945.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/059a9bec-f4ba-4091-adf3-02b88786c72d/plantronics_m180_universal_noise_cancelling_wireless_bluetooth_headset_manual.pdfIn PDF document text
    • http://zawanaxakav.epizy.com/reduce_size_macbook_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e52106-c335-4acb-b2c5-a7c4abbf30c4/welejupaxifanos.pdfIn PDF document text
    • http://davutawopoban.epizy.com/folefozorejovefo.pdfIn PDF document text
    • https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_a7b8223226c348839cfea2f3f2bef80f.pdf?index=trueIn PDF document text
    • http://donamekadozuxuk.rf.gd/7th_grade_math_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879288d0-83a6-4553-8edb-a376d8c6f319/why_would_i_have_a_bald_spot_on_my_head.pdfIn PDF document text
    • http://fekerudosepu.rf.gd/annabelle_creation_full_movie_free.pdfIn PDF document text
    • http://dogamesesokuj.rf.gd/totoker.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F603 5684 bytes
SHA-256: b35b99c3c57b921c13897383b1b3b0c0838a599df07d9f1dfe3daf628f1944b7
font_01_sfnt_off00020937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20937 12840 bytes
SHA-256: 148a3948ec2e3a506018a0e217e524d470d565d4f2d1660fd691c2992cda1e9b
font_02_sfnt_off0002347a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2347A 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e