Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f376d3c77df854…

MALICIOUS

PDF

84.8 KB Created: 2021-03-23 11:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afc293fe2cb9c8a3c67f0b5a64e0f6dd SHA-1: 1ce0ff4c15185406d62fa8c2fa42b6a0412f7b54 SHA-256: 64f376d3c77df854a4d646f267b5f2c4daf229ceafaedb2bd3a6cee0b8dc2696
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as legitimate documents but lead to unknown or potentially malicious domains. The presence of a critical heuristic firing for 'PDF_SEO_LINK_FARM' and a high ML score indicates a strong likelihood of malicious intent, likely to distribute malware or conduct phishing. The document body, though heavily corrupted, contains keywords related to downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/wix?keyword=download+hungry+shark+mod+apk+ios
    • http://jirenaxapibetig.scienceontheweb.net/budapest_tourist_map_download.pdf
    • https://cdn.sqhk.co/bewiviki/60jcsid/cut_it_out_cutters_etsy.pdf
    • http://pimifawimonidij.mywebcommunity.org/dewolubixobujabelo.pdf
    • https://miduginoxem.weebly.com/uploads/1/3/4/8/134892771/6775063.pdf
    • https://cdn.sqhk.co/kaxonavi/oifYijc/among_us_wallpapers_hd.pdf
    • https://jodejivosarixu.weebly.com/uploads/1/3/4/3/134314211/2da3a.pdf
    • http://vexoxem.scienceontheweb.net/minority_scholarship_form_2020_20_download.pdf
    • https://zasuzepomuban.weebly.com/uploads/1/3/4/6/134627511/02d1df0d73.pdf
    • https://molujeridinu.weebly.com/uploads/1/3/4/4/134400438/6281595.pdf
    • https://cdn.sqhk.co/zarejesorufo/hgdidif/lomemuxujenofil.pdf
    • https://jutifakakunule.weebly.com/uploads/1/3/5/9/135985430/6693733.pdf
    • http://ferabugajefelam.mypressonline.com/ariens_snowblower_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_66f188dda3fa4d8387c03641b4e9fc16.pdf?index=true
    • https://c93e3e17-565c-496b-95a0-45fea83b015f.filesusr.com/ugd/cd9bb8_e0d7348bb8b64dfdba8586225b3159dd.pdf?index=true
    • http://wipadafefuxasi.onlinewebshop.net/neet_2020_answer_key_aakash_with_solution.pdf
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_c1ef0c207b154290a6d6440a8d160bdc.pdf?index=true
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_c199e902da8a492aaa7859b66bc0773d.pdf?index=true
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_35bde9f93ed540cbb5c28a463daa9aba.pdf?index=true
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_efa8a7402dbb472a8a7bc3d239514782.pdf?index=true
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_081b10a2558b4446b250b6de4c4fb45e.pdf?index=true
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_9c5f4d9324c14b1f9e74a3a93212c7fc.pdf?index=true
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_95a26d9d7bf7400387ea605f6dedf712.pdf?index=true
    • https://178fd8f3-986e-459b-a431-83c1f58eadb8.filesusr.com/ugd/7a8e82_5c95ef02ebcc45888d8db3b922320115.pdf?index=true
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_c5e2f0a2afdc40ebbcc4c6a7236d8a25.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e9.bin
1bb60c354327b0dde06dc616fd8373ea2fc0410c492d85fffa8bb7eb134c906c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 5632 bytes
font_01_sfnt_off00010608.bin
1b589c09c7bb0db8bac8a52f842155c7c79ac0de882670f162cfdbe2378c1023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 10636 bytes
font_02_sfnt_off00012a94.bin
fbb4956d300a2bc1609a147253032784f65f780f7e83b06b3c79c00a788569c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A94 17704 bytes

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