Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fe4d15bcc62eaa…

MALICIOUS

PDF

80.5 KB Created: 2021-02-20 09:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 464de97fe1bdca7e4c884fa91d6108fc SHA-1: 08aed388db47e6f0021b81ac8ce384e75c480753 SHA-256: b6fe4d15bcc62eaa8262eb265cc7adaf574a25c1f6543b2d5197e02ad2001dc5
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a phishing attempt. The document impersonates PayPal and uses a lure related to 'Steam wallet hack 2020' to trick users into visiting a malicious URL. The embedded URL leads to a domain that does not match the impersonated brand, further confirming the phishing nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://baarspo.ru/wix?keyword=steam+wallet+hack+2020.
  • 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://baarspo.ru/wix?keyword=steam+wallet+hack+2020 PDF link annotation
    • https://cdn.sqhk.co/mafulavet/bwiejdc/79917554898.pdfIn PDF document text
    • http://salestore.pro/lerobotisiduv1xzez.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/BhWifcH/berurojofunafawo.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/HpjiVhf/xufepubobadaros.pdfIn PDF document text
    • https://cdn.sqhk.co/mezomabesoki/i9Bhfhg/minecraft_tnt_mod_1._12_2_9minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/PSgg5ii/gold_rush_mining_camps_names.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408858/normal_5fda7ffec09b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466666/normal_6012324e4f657.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/E9jht97/the_last_stand_union_city_hacked_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/jeHvcTi/51434131440.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/kugejww/basketball_legends_unblocked_games_99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458849/normal_5fea2ef5f40bb.pdfIn PDF document text
    • http://com-connexion.xyz/86545969149l48ft.pdfIn PDF document text
    • http://yogist.fun/jirubodomubobamurugil56yj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470017/normal_5fde30562e409.pdfIn PDF document text
    • https://cdn.sqhk.co/puwetudul/SBKD7hb/pikemejudaxus.pdfIn PDF document text
    • https://cdn.sqhk.co/vusopukov/ighhRid/68771994797.pdfIn PDF document text
    • https://cdn.sqhk.co/zusisoko/igGhjKq/70709198420.pdfIn PDF document text
    • http://www.steamIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 5296 bytes
SHA-256: d8cc0046b0cd4a3fd17f662d6d0520cbed36507581a4b1789af05449c3628668
font_01_sfnt_off00011145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11145 10412 bytes
SHA-256: 1682cdb4e67c8253375fabf40d0c628b036d316a3d2690d721e0c2d3a3c998bb

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