Malicious PDF — malware analysis report

Static analysis result for SHA-256 76db333cc0e98f29…

MALICIOUS

PDF

68.2 KB Created: 2021-04-03 02:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 757fd0e9f1539eb4e2222fb7518d41de SHA-1: 4f532171db345f2220309827f865c6c182a0cb98 SHA-256: 76db333cc0e98f29f0742b163e0bcc16d50d29a62135e41262ca1704ec6bc904
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely leveraging a PDF exploit or social engineering to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/award?keyword=bakery+equipment+list+business+plan+pdf PDF link annotation
    • https://cdn.sqhk.co/xeloxilava/bzFWGMP/checkers_near_me_right_now.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5ffb123cef6a0.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/45916040866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_601de9b620156.pdfIn PDF document text
    • https://cdn.sqhk.co/nemalerute/dhV3gcR/reversionary_real_estate_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481278/normal_6021a564f28d9.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/7967783203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_6000205896df6.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/Dvmhiid/duturazarijokud.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/dungeons_and_dragons_modules_for_beginners.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447885/normal_5fdf620956053.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/ejijj13/infection_preventionist_salary_minnesota.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/2pNSthc/galactic_colonies_hack_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zikeko/podevupinuloninatulobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72904c5-931c-43fb-96e1-d266d0273173/white_rodgers_thermostat_1f78_5_2_day_program_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/voodoo_labs_pedal_power_2_plus_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6157b151-b4bb-4c06-8dde-7a2f7ba13a34/86490945017.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/3275914028.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/drinkwell_pet_fountain_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/masokidegemejira.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/perfect_blog_post_format.pdfIn 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_off0000cf2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2F 5668 bytes
SHA-256: c0fde04da75be30c16969df73571e9639c4cb6a519941f19f6f6ef9038488984
font_01_sfnt_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 9680 bytes
SHA-256: 6dd6a5034e4502e3ef13d0395f859c613ec9ca2378d81260b26d38498fc056bf

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