Malicious PDF — malware analysis report

Static analysis result for SHA-256 f947c71d08a28a47…

MALICIOUS

PDF

109.4 KB Created: 2021-03-25 23:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5e861626b4f181c309a632ed18b9ec9 SHA-1: 42529f31bd8c3fb9c5df52fb1716b1d76306bf93 SHA-256: f947c71d08a28a47dda79fb5aa140ba9dc232f8ee587b72748a0fba0a77e72a4
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary external URI points to a website that appears to be part of this link farm. While no scripts were extracted, the presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to potentially malicious content hosted elsewhere. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 4

  • 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.
  • 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://seumenha.ru/award?keyword=modern+arboriculture+pdf
    • https://cdn.sqhk.co/kelopifagisu/qwjfJsW/6098132754.pdf
    • http://mixit.info/aleph_paulo_coelho_review6vhqn.pdf
    • https://cdn.sqhk.co/jivumigen/iheyThc/guitar_sound_loops_free_download.pdf
    • https://nonibebufixaz.weebly.com/uploads/1/3/2/6/132682934/kunefepabisofa-fafado-biziwiridaselem-pemex.pdf
    • https://vetenejoxo.weebly.com/uploads/1/3/1/3/131379321/xunanimotabawiz-tonezunezakowi-wudosobi-zugadetopirek.pdf
    • http://table-wait.com/book_knots_on_a_counting_ropenljeg.pdf
    • https://cdn.sqhk.co/leluforeref/GGibGeO/devil.pdf
    • http://instasurprise.online/63761358255n6bet.pdf
    • http://mikenitoxa.22web.org/87014465780.pdf
    • https://dujemezore.weebly.com/uploads/1/3/1/3/131381607/4784126.pdf
    • https://cdn.sqhk.co/zoluwumenad/gfjiBje/41511434023.pdf
    • https://cdn.sqhk.co/mamozinuba/ifheJgf/factory_format_iphone_5.pdf
    • http://jawirigagoboni.iblogger.org/arthrex_distal_biceps_repair.pdf
    • http://firstreadersclub.com/understanding_viruses_teri_shors_ebooko4je2.pdf
    • https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/jarekela.pdf
    • http://kvyovk.xyz/powodasimiwetkyu5z.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_c9a6a198b074415abb30bf4a5fd0d728.pdf?index=true
    • http://kinefinukabel.epizy.com/83924347467.pdf
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_a4650cc8a309434cb6ee2707e3e0edfb.pdf?index=true
    • http://lelupiborojez.epizy.com/77338670347.pdf
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_0dc0ef68d6de4d55b864408af23fa9fd.pdf?index=true
    • http://nividibewejoba.rf.gd/gejekokigogositadudo.pdf
    • http://segefebeb.epizy.com/life_application_study_bible_nkjv.pdf
    • http://lalepimesizi.epizy.com/pc_jain_paleontology_download.pdf
    • http://loluxemo.epizy.com/68624171706.pdf
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_f308869165c34a3d8032a8ce3382eeae.pdf?index=true
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_88df85c1a2a24be9b7247032182348ec.pdf?index=true
    • http://jigotukaxeze.epizy.com/zemos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016af4.bin
9f28d3c21bc4bcf47620421fe4b82e1a12e4edd74491e8c71bc6991835d1817d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16AF4 5116 bytes
font_01_sfnt_off00017c72.bin
093c1754df16f0eabe982f3dd47ea1562102d1e11dc3896b96d3e965b6b69123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17C72 12160 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.