Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3fd3d7c260950a…

MALICIOUS

PDF

73.1 KB Created: 2021-03-14 21:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09a0d25f0c0938b46a1648ff0b0e5630 SHA-1: 0fef3a374eb2f277fd6377d7c3398f3ac79421e6 SHA-256: 5d3fd3d7c260950a0df73729ad9d1b7fc1901960ca3e443859c86f828aeaf16c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a significant portion forming a link farm, suggesting an attempt to drive traffic to potentially malicious or phishing sites. The embedded URL 'https://gimoguvi.ru/wix?keyword=free+cloud+mining+website' is presented as a lure for 'free cloud mining', a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/wix?keyword=free+cloud+mining+website
    • http://levantegroup.net/avg_internet_security_2019_setupmf9gv.pdf
    • https://cdn.sqhk.co/konafomaz/hcpvjcx/bingo_holiday_free_bingo_games.pdf
    • https://tudadakamoziv.weebly.com/uploads/1/3/4/5/134596668/gixikoxonuxuwi-wunigarun.pdf
    • https://cdn.sqhk.co/sileluzorupo/vgicLar/93744703469.pdf
    • https://dofigova.weebly.com/uploads/1/3/0/8/130813881/4344877.pdf
    • http://reduslimitaly-official.site/pumovusidalibeduga1joj0.pdf
    • https://wosefekolejareb.weebly.com/uploads/1/3/4/3/134340916/3046270.pdf
    • https://cdn.sqhk.co/sivofedexim/jfribBA/soothing_english_songs.pdf
    • https://cdn.sqhk.co/ralapogifur/iitsnB4/15933027980.pdf
    • https://jijobowuzum.weebly.com/uploads/1/3/4/5/134590228/wiganemofabejow_vujukafo_sepemaxidopenaw.pdf
    • https://cdn.sqhk.co/jotepomi/E0hiedN/8726265016.pdf
    • http://sewawena.scienceontheweb.net/wajesenosedibakifof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fatavetotujel.onlinewebshop.net/free_aptitude_test_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/029c27ba-aec1-4035-94d2-4282092b357f/52268109247.pdf
    • https://uploads.strikinglycdn.com/files/757b6b39-fd0e-4f1f-aa1c-223a22fff522/how_to_program_uniden_dect_6.0_handset.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_off0000e1bb.bin
01be6628b92031a1fe0920178bc2cefd5be33a6f7078d0cb20be582518c1442b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BB 5236 bytes
font_01_sfnt_off0000f389.bin
7cc77cb2fb3265b0f8881bb9f8a204a357711cdf1297f230a6dbaf4590f03356
pdf-font-stream PDF embedded font (sfnt) at offset 0xF389 10696 bytes