Malicious PDF — malware analysis report

Static analysis result for SHA-256 748717729a96121f…

MALICIOUS

PDF

77.9 KB Created: 2021-03-30 23:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b7197bc7782f5bfe988d12c6b552804 SHA-1: 322b89ec4fcd59ca29c6d90d3935acd1a7dfecb4 SHA-256: 748717729a96121fb407c0d97436ee68d394e937c9fe34a438697dae8db11cf3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, with one prominent URL being `https://xezojetit.ru/wix?keyword=tales+of+symphonia+leveling+guide`. The presence of numerous external links suggests a link farm or phishing attempt, aiming to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains metadata related to its creation, reinforcing the idea that it's a crafted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=tales+of+symphonia+leveling+guide
    • https://static.s123-cdn-static.com/uploads/4416301/normal_5ffc108f6b6c9.pdf
    • http://jolawusivig.iblogger.org/97876410765.pdf
    • http://smartradiobf.ru/92386765070wdcpg.pdf
    • https://cdn.sqhk.co/letarezetap/gchdjaG/lolegafofapolad.pdf
    • https://cdn.sqhk.co/paleguvebo/Dhd8ghX/7_farkli_renk_mega_boy_bez_dolap.pdf
    • https://cdn.sqhk.co/tuxonewebuke/jbNG7hg/15732853444.pdf
    • http://5-euro.info/maax_spas_jobs5u5ry.pdf
    • http://lakcherie.ru/zomarebemamevejogizivari3th20.pdf
    • http://podarokinsta.site/76296773082oo2hy.pdf
    • https://cdn-cms.f-static.net/uploads/4490918/normal_601e935856bc4.pdf
    • https://cdn-cms.f-static.net/uploads/4379722/normal_601e3c1e3488e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f516a5e5-1936-4b34-b436-a929b3a34b8d.filesusr.com/ugd/774001_7e4488376c2b4932a9f50276da654c99.pdf?index=true
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_8f68486774294dc0abe4c11007b07921.pdf?index=true
    • https://f7927488-8152-43cb-a667-e231f58cc5c5.filesusr.com/ugd/950cc9_3d26686b2b2d4be2a392fe610002462d.pdf?index=true
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_69247720265a4975b20f97ae8ebfb5fe.pdf?index=true
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_2d86db11bf3d4896a57a51202ed3baae.pdf?index=true
    • http://vumesurev.epizy.com/aromaticity_worksheets_with_answers.pdf
    • http://lodavudomajip.epizy.com/50940956911.pdf
    • http://litaxuroba.rf.gd/cdc_hep_b_vaccine_info_sheet.pdf
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_995d904610a14010be51579a12b7b113.pdf?index=true
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_e2d809b3238a4a7f8d0dfa813af4560e.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da34.bin
47af38a8ad50a48208fd9030dc0edac4a13b9aa423c3b579b4002410c044f5d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 6328 bytes
font_01_sfnt_off0000f000.bin
3aab951ba4d65bb72bf0fd765abe7ddc4966b6ddfecf1dc5d15d3fd080ccc086		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 5468 bytes
font_02_sfnt_off00010289.bin
d4a2c8ef2959633321e1091351f00d8b6763a5d00de8d2758b4bbbd17452cae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10289 11812 bytes

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