Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f2138183f2d5ce…

MALICIOUS

PDF

79.1 KB Created: 2021-04-01 00:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 53826a491a5245a550af52054d708f88 SHA-1: edf6cd40f85ed5f08068d56ca585f7fa17c0c6cf SHA-256: 59f2138183f2d5ceaae6c5e876d449163aaa86687bc16f32ea598ccd1f500772
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a large number of links on potentially untrusted hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=924+area+code+california PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469828/normal_6011b56232b82.pdfIn PDF document text
    • http://wordsideget.top/blade_inductrix_bl_bnf_basicb9btw.pdfIn PDF document text
    • http://ceiling48.ru/scruff_meaning_in_telugulyge1.pdfIn PDF document text
    • http://peuly.xyz/cub_scout_book_wolfgkjfe.pdfIn PDF document text
    • http://sibuvre.com/602767575169xubi.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/604315052319r4ve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378846/normal_60327b74175e3.pdfIn PDF document text
    • http://sq11mini.com/donekigebapunapupikoj3jl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_6064cad7314a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_604da3659f6e1.pdfIn PDF document text
    • https://mazanotofubemiz.weebly.com/uploads/1/3/2/6/132681192/retujiremojo.pdfIn PDF document text
    • http://republvinb.fun/nuxabusimutubonikobifs1ues.pdfIn PDF document text
    • http://trudogoliya.online/lepipisutilojoxikaxaripe81vjg.pdfIn PDF document text
    • https://merasata.weebly.com/uploads/1/3/1/3/131378960/c0096042eafb9bc.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://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_5b1fe3a2ef6944359d8fd4ce40d1df55.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88422645-0e1c-41aa-b1a1-4feb0e10d2fd/tecknet_mechanical_keyboard_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c14cb3-c21b-4441-b8ba-0df5948dd2c7/jedewosoruwazikamad.pdfIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_2c36505155e3402e8d85ce0171d4fc1f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/805cddd6-e84b-4173-af0c-8408fd5644de/65827505648.pdfIn PDF document text
    • https://3926d074-74ab-41cc-aa9d-340192ccda4e.filesusr.com/ugd/5619e7_a337c99c302e4334a531803ca15b600d.pdf?index=trueIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_127ef5ad5b7844a58a183a395f5e4861.pdf?index=trueIn 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_off0000ed22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED22 4824 bytes
SHA-256: 30422a7c1d09beaf0455b58cb29e96bd3086ae369898f7e53bf79acac013005e
font_01_sfnt_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 10456 bytes
SHA-256: b9ef981190980450224111527adbb42fd9bb1ef88ee0649d14c17c612e9c34d5
font_02_sfnt_off00012117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12117 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.