Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3638b36748feda1…

MALICIOUS

PDF

79.0 KB Created: 2021-06-10 00:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1e8844d97c5468c80f89debab9f3961e SHA-1: b2c24904192e71e8dbfa607ea9b96477406c001f SHA-256: d3638b36748feda17a4056ba59b6d9e933c27f417eb6b35526445742fce1ec5d
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to potentially malicious URLs, and contains a deceptive download button. The presence of multiple external URIs and a link farm on disposable hosting further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=tere+chumme+me+chavanprash+hai+song PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4393503/normal_60b1a7ba2f26b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427498/normal_6032dbbb1def9.pdfIn PDF document text
    • https://lisokafi.weebly.com/uploads/1/3/4/6/134694643/bazepes_suniporelamaduk_japulagidowiv.pdfIn PDF document text
    • https://botefajom.weebly.com/uploads/1/3/4/6/134690565/e6b3d3f90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417129/normal_5fcf454be74ba.pdfIn PDF document text
    • https://pijuvadugodawa.weebly.com/uploads/1/3/4/3/134307721/dibilapogujurol.pdfIn PDF document text
    • https://fuvuliles.weebly.com/uploads/1/3/4/9/134904701/2653431.pdfIn PDF document text
    • https://dubigeta.weebly.com/uploads/1/3/5/3/135341625/2628c939927e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_6030279747824.pdfIn PDF document text
    • https://rirudelibuwa.weebly.com/uploads/1/3/1/6/131606594/bobademulifogaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_606b510ad7166.pdfIn PDF document text
    • https://maloxozalujov.weebly.com/uploads/1/3/4/6/134624338/1cfb3378.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://wurutaw.pbworks.com/f/jamepatarozeroduwis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571b91f3-ef74-42cd-95a7-402dc0ef73e1/sinevuduzodusewowar.pdfIn PDF document text
    • http://xujefix.pbworks.com/f/55036664579.pdfIn PDF document text
    • http://wekanivu.pbworks.com/f/latest_ringtone_2020.pdfIn PDF document text
    • http://welidaka.pbworks.com/w/file/fetch/144836055/2045926508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d99ed5-3319-487a-9ec3-636b61e1c596/13154191416.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A9 5324 bytes
SHA-256: 04f8e6a0e34a65610efcde21b57d8db12fee4b0389ad282e05e8ab7465f12fba
font_01_sfnt_off0000f4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A3 11200 bytes
SHA-256: f82fe788afd6b048068bd709c2cd03db6b6a570e1e71ef189bec522c60f94bc2
font_02_sfnt_off00011b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 4896 bytes
SHA-256: ad2c168ec4c6629bae53440ea4f4535be5d1d34ed2ae00937246db49b2a28e6e

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