Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6e88ab8844b816…

MALICIOUS

PDF

76.0 KB Created: 2021-02-26 22:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6bba6fd2aa01cf01fef3ace9f1892a85 SHA-1: 73f739626e1b4108f642557ef926ead9fa372555 SHA-256: 3c6e88ab8844b81686c073debfe158b18482dc0ee880c85e2ff28662352e83b5
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to first-aid kits, which is likely a pretext to drive users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/123?utm_term=que+tiene+que+contener+un+botiquin+de+primeros+auxilios PDF link annotation
    • https://puriruwuz.weebly.com/uploads/1/3/5/3/135395363/4b39e0ca32.pdfIn PDF document text
    • http://topplafond.xyz/what_is_avrt_recoverylb5wm.pdfIn PDF document text
    • http://uanews.website/tonivubaboguxek66b3.pdfIn PDF document text
    • http://flowerport.market/69136581271gg81t.pdfIn PDF document text
    • http://bestgirl69.com/furewimakamxhn1.pdfIn PDF document text
    • https://tejenopaje.weebly.com/uploads/1/3/1/1/131164027/6169579.pdfIn PDF document text
    • http://ro-shop.space/resume_templates_ontario_canada64oll.pdfIn PDF document text
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/99c071.pdfIn PDF document text
    • http://rakajipof.22web.org/talking_angela_2._5_apk.pdfIn PDF document text
    • http://yachts-4-sale.com/automotive_bulb_numbers6dzsl.pdfIn PDF document text
    • http://gratoraama.space/741269887229rzcu.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/fzcQVja/32482804266.pdfIn PDF document text
    • http://look-hotel.com/norton_anthology_of_american_literature_shorterrit1w.pdfIn PDF document text
    • http://vipadminler.org/3182162836t7dyh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/google_image_search_size_filter.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_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 5612 bytes
SHA-256: e0287e6cd4f3222aa6f1197991b0f7d817fc76af73c128c072b556d8f3970bd8
font_01_sfnt_off0000fad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD6 11720 bytes
SHA-256: 8c3ec2c6920634446e342953c78397662000ae4ccd8920163b814564d8e4f5fa

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