Malicious PDF — malware analysis report

Static analysis result for SHA-256 4107ad4b45fe3e12…

MALICIOUS

PDF

75.3 KB Created: 2021-03-24 19:57:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5e682f3ab76b70a6faa4725500a61e09 SHA-1: a8d937b5bf0b5b954366c1909f0df5ec20c38cb9 SHA-256: 4107ad4b45fe3e12131b357251b0c33bf80d7451caf5b90557b6954e1c6a0daf
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery attempt. The document contains numerous external links, many of which point to disposable hosting and utilize UTM parameters, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure strongly suggest an attempt to trick users into visiting a compromised or malicious domain, likely for credential harvesting or further malware distribution.

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://druttle.ru/strik?utm_term=iomega+home+media+network+hard+drive+windows+10 PDF link annotation
    • http://vukosam.22web.org/22670842913.pdfIn PDF document text
    • https://xezudabumaku.weebly.com/uploads/1/3/4/3/134377243/6a1d4d6d6131.pdfIn PDF document text
    • https://gakosokilexavum.weebly.com/uploads/1/3/2/6/132695298/luzap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5ff225331e91d.pdfIn PDF document text
    • http://suvexavez.iblogger.org/how_to_hard_reset_canon_mp250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_6053137b762e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_60357499a9944.pdfIn PDF document text
    • https://cdn.sqhk.co/jivumigen/3gficsv/32283331084.pdfIn PDF document text
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/9707004.pdfIn PDF document text
    • https://kifakofaw.weebly.com/uploads/1/3/4/0/134016777/7024888.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/jihbiSh/oregairu_hachiman_x_totsuka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/77145557-5359-46b1-a7f7-ad168101605a/sony_hdr-as200v_full_hd_action_cam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c5eff24-630f-4e60-a67a-020938afab7b/we_need_you_lord_right_now_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/41923923255.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/sasol_bursary_application_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/aurangzeb_movie_moviescounter.pdfIn PDF document text
    • http://sipofepusadofas.rf.gd/43109018355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4a709c-cdac-4485-9b38-15e117f5815b/doterra_essential_oils_of_the_bible_powerpoint.pdfIn PDF document text
    • http://purukalalud.epizy.com/2005_ford_6.0_rebuild_kit.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_off0000e642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE642 5556 bytes
SHA-256: 479847534a1d74e81c63f33c5237b9479301fd0c1e933c450f6cbc4d0f4ee398
font_01_sfnt_off0000f912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 11412 bytes
SHA-256: a2507a9c14cdcd3550e39cdec8f2f867926784dbdce66f426d2f402c873e37c8

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