Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9efd6f8c26344a6…

MALICIOUS

PDF

75.5 KB Created: 2021-06-06 07:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 11db5b5d9ad1922d91dc83ecd49669e3 SHA-1: c8abdb4d77be077f34ef5eeba14101272ebf08fd SHA-256: d9efd6f8c26344a61c898dba7d5d0a010edcc75bf369889ad712a39383d19a68
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-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://garglob.ru/pbw?utm_term=caja+de+fusibles+jeep+liberty+2003 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375521/normal_604f2664bc0ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466366/normal_5fc8713e6bbbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_5fdc412d52bba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381297/normal_60269e542f5b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403274/normal_603af24b4b4a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_5fe868b2c45e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_605610feabb80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_60104c72dd278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468571/normal_603032932fc63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_5fcf622aaecaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479932/normal_60104656ef96c.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4374951/normal_60b6fa0ef0257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5fe75ef2894d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_600f1d199fa1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giresizuloki.pbworks.com/w/file/fetch/144443478/rilewuwomibuwofizowegepas.pdfIn PDF document text
    • http://dipoziw.pbworks.com/w/file/fetch/144453021/catcher_in_the_rye_discussion_questions_chapters_1-4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967475d1-6b58-42f6-8083-80906fb826c9/coleman_evcon_presidential_furnace_pilot_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754f9fc5-7ed4-44d8-bfa5-cb5a53e9c24a/how_do_i_bypass_the_lid_switch_on_a_kenmore_washer.pdfIn PDF document text
    • http://bujolajoxek.pbworks.com/f/82335388679.pdfIn PDF document text
    • http://kevukimugo.pbworks.com/f/free_fire_magic_hack_apk_download_2020.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_off0000e5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 5696 bytes
SHA-256: c2e041c23cc6b5ea6a866b45b9e514ade20830ca108cbf845fde0e33c19355c4
font_01_sfnt_off0000f958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF958 11468 bytes
SHA-256: 932d4a66a15b392003e28457fb120ca22bd68ba32ece81b5258aaf93de91afe5

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