Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcdd324d78068cbe…

MALICIOUS

PDF

79.7 KB Created: 2021-04-11 14:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2b14fb732ad868f33a74b6ccd8c0e0d5 SHA-1: 76c53559031038ae5799e372e4b14931e87b7137 SHA-256: bcdd324d78068cbe34463dc7a901cfd936970e0c98d5187fb6271e87e841071b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gimoguvi.ru/strik?utm_term=how+long+does+it+take+to+get+iso+27001+certified PDF link annotation
    • https://cdn.sqhk.co/tutabalero/hRghjef/71695236810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444377/normal_6021a829d7379.pdfIn PDF document text
    • http://sollabs.xyz/xbox_live_problems_today_uktzwkz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379959/normal_5fde563963d42.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/RMF2hgX/68058221816.pdfIn PDF document text
    • http://dutadone.22web.org/forma_para_canele.pdfIn PDF document text
    • https://cdn.sqhk.co/musamari/fjeJggg/butterball_indoor_electric_fryer_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465402/normal_603889aea27cb.pdfIn PDF document text
    • http://zofirax.iblogger.org/64253313100.pdfIn PDF document text
    • http://mybestchan.online/book_of_life_characters_twinsuhj1j.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/hjaOcid/mipuzuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/031e5079-46a6-4327-8bf6-34ae5747095b/27728149372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d7fb752-8de1-4c4c-8b4f-63f8053a51b3/what_is_the_best_70_pint_dehumidifier_with_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043b6c91-a658-4679-8caf-737f0a313f8b/biohd-3_error_fix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb99ce8-5b04-4ff6-b4d4-cb6abf37bbf3/sony_ps-lx300usb_belt_replacement.pdfIn PDF document text
    • http://lobidirubegevil.epizy.com/st_banjara_dj_audio_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f029a0-1c12-44d9-8f9a-4b10a49eb5de/mibafaxifatisowaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d3ba9ca-ff54-4fca-a768-70de51489965/how_to_reset_your_directv_genie_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be47304e-6fc5-4633-bfcd-5f7309a49a2b/mesubib.pdfIn PDF document text
    • http://mesepojo.rf.gd/scerts_assessment_forms.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 5500 bytes
SHA-256: 990a01385d382fe38c5f9de21cccf895c3f01c54079270316c01de840da97533
font_01_sfnt_off0000fec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC1 10596 bytes
SHA-256: 3b8dd46649a621df6dc2c87f5f86fd89c5c098454408ccadcb5ba4f417731791
font_02_sfnt_off000122df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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