Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d32c18c89bbc8f…

MALICIOUS

PDF

84.4 KB Created: 2021-03-16 22:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3dfb034c7f148319e801338067aee9e3 SHA-1: d4ab72491db71b20f55c4ca601665b3a669caaba SHA-256: 43d32c18c89bbc8fcecf811a000c258b0e6cd6081381d9e5029bdb2e7708aa0b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to movie downloads, a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://nipisod.ru/123?utm_term=alaipayuthey+tamil+full+movie+1080p PDF link annotation
    • http://fazejajogavu.medianewsonline.com/bixetedotemowaxuriv.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/lRggCXr/gun_strike_hack_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/Ggi1icT/ben_hur_movie.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/is_fx_camera_better_than_dx.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/7gfjhgz/14227281910.pdfIn PDF document text
    • https://zadivodewereb.weebly.com/uploads/1/3/2/6/132683121/7411241.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/2880254.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/89qmxje/door_kickers_mod_apk_1._0._99.pdfIn PDF document text
    • https://mafoxoluz.weebly.com/uploads/1/3/1/4/131483222/vabewetomeju.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/gidDhfy/41922739686.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/hChfiio/gopomuxoxutesajuxodado.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/iihj8ih/cnc_machine_for_home_use_metal.pdfIn PDF document text
    • https://cdn.sqhk.co/javijaxim/rshhhex/private_number_iphone_canada.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/648f40b.pdfIn PDF document text
    • https://cdn.sqhk.co/gedadixugud/7eNi5Eu/nilixesisirov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_e124b5097fca431e93486709bf9ee0c3.pdf?index=trueIn PDF document text
    • http://zupitatip.atwebpages.com/books_online_free_download.pdfIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_c858c690b0e74236b7167e488ff61cd4.pdf?index=trueIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_db970493e52447868b50bb6a9abd74a6.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4B 5180 bytes
SHA-256: 1cf046b7b796f025134b8241de04a1bed539dd08aac8f8ad8ce6f6bf7aeef56c
font_01_sfnt_off0000ff07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF07 3512 bytes
SHA-256: 560fb2bf50f3975268f696f03330eccedc759c5ee7af8ed05b047d86318a6776
font_02_sfnt_off00010ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE9 11424 bytes
SHA-256: adc8310a008c35bdc93d7f030b2034fcf1e63b2443bbe4862503d6de1ed7064a
font_03_sfnt_off000133f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333