Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06559e4af0ab9e2…

MALICIOUS

PDF

83.5 KB Created: 2021-03-28 13:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd1fd493db078ffc8fa1a188ad9845cd SHA-1: 59f0bd313b2361c522415eacfb0c54c1cf8efb0f SHA-256: a06559e4af0ab9e278c1ea3c821ddcfb1124e206d73f34bd66cba675650b0ea9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains an embedded URL that redirects to a suspicious domain, likely to host further malicious content or phishing pages. The document body, though heavily obfuscated, appears to be a lure related to search terms, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://gimoguvi.ru/wix?keyword=boy+scouts+christmas+tree+lots+near+me
    • http://pukegowavoja.iblogger.org/95950193982.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_e0e3e935377a46a8abfcd6b4b43745be.pdf?index=true
    • http://numumodi.epizy.com/apostrophes_for_possession_worksheet.pdf
    • https://s3.amazonaws.com/difigomisosak/tebepudajudikegipi.pdf
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_968ef26067ad4e50a151153d3aab2b1e.pdf?index=true
    • https://s3.amazonaws.com/fadupazageraf/18832336822.pdf
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_4b5ed56513f04b88b4776f9be174a6c2.pdf?index=true
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_3702c5753bf8439ab9e99e50cd39b19e.pdf?index=true
    • https://s3.amazonaws.com/bulolimepol/28799479779.pdf
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_9b960ff77b0a40a9a6fdae2ce63f94f0.pdf?index=true
    • http://ravowimeju.epizy.com/59924693331.pdf
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_4ff8a35a5d9748c9822c7a3215c96755.pdf?index=true
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_a49383219baa4286a8547837ab18cd91.pdf?index=true
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_f94b46808e174505a47aa195ff082f9b.pdf?index=true
    • https://s3.amazonaws.com/rutufokedizon/govumut.pdf
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_f6ab7dc837504cf3bd23ae67d0e6d041.pdf?index=true
    • https://s3.amazonaws.com/jusagi/is_indian_stock_market_open_on_diwali.pdf
    • https://s3.amazonaws.com/bokofapig/esc_guidelines_2017_dual_antiplatelet_therapy.pdf
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_30b46ff089974272a1d6a0dc400d8980.pdf?index=true
    • https://s3.amazonaws.com/gateme/58965889193.pdf
    • https://s3.amazonaws.com/pasutiz/cyberpunk_games_for_android.pdf
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_e5791e0295084987a8eb269c08f5161e.pdf?index=true
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_cc5af7368e7c47e2aeb739f04987910b.pdf?index=true
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_81e3514616074ddab1c2a16d0c4a592b.pdf?index=true
    • https://s3.amazonaws.com/mubefula/samsung_ww80k5210vw_review.pdf
    • https://cff07a16-13b2-455b-8a78-148a75b158b4.filesusr.com/ugd/cda0c7_69305efa99024b669918b9eeb6f94ab4.pdf?index=true
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_1ec420a730b0476b9f698e89c21b6ee8.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_off0000fa74.bin
448e80f0e5a3a938ab7931fa35a2aa7fc9521d1e8fa81f91d407a78883a931e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 5072 bytes
font_01_sfnt_off00010b8f.bin
fdfcbee6271dcad40ee6d022e3205aafff078ed113277ed36bcd0b83f9f6eee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8F 11308 bytes
font_02_sfnt_off0001320c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1320C 4324 bytes

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