Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a84d6d14316f63…

MALICIOUS

PDF

67.1 KB Created: 2021-02-12 03:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2cc521cf15e53fb8115011a909bfd55c SHA-1: 952304c7bac0ac904aeea928e7926e0736001a23 SHA-256: 36a84d6d14316f63e40281739c7030318dece5ab0c1f16bdbae1bad11831b3f0
126 Risk Score

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 0.9998

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://jottigo.ru/wix?keyword=the+american+sign+language+puzzle+book+crossword+puzzle+answers PDF link annotation
    • http://graatorama.fun/download_youtube_app_for_androidq8psi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404296/normal_5feb4e10e15e5.pdfIn PDF document text
    • http://ins.expert/bagorusogebimabubiwidajaxi9zh.pdfIn PDF document text
    • http://girameluxo.iblogger.org/blackberry_link._exe_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417983/normal_5fcc6265592c6.pdfIn PDF document text
    • http://pesugesilufafa.iblogger.org/3533732440.pdfIn PDF document text
    • http://zabogena.iblogger.org/implosion_mod_apk_latest_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454677/normal_5fc6919e59fc6.pdfIn PDF document text
    • http://coolvdomaion.online/33809475679q1goj.pdfIn PDF document text
    • http://shopwithsale.website/barbie_dreamhouse_adventures_game_vip_unlocked_apkloy4w.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
    • http://kipenul.epizy.com/bsg_guidelines_gastroparesis.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/car_and_bike_racing_games_apk.pdfIn PDF document text
    • http://wulekugigewipo.epizy.com/25632568136.pdfIn PDF document text
    • http://xesepodine.rf.gd/perforated_stainless_steel_sheet_philippines.pdfIn PDF document text
    • http://guxajez.rf.gd/24901953505.pdfIn PDF document text
    • http://zanawolusebil.epizy.com/gepomixupebekuxu.pdfIn PDF document text
    • http://dipulitexaxuz.epizy.com/95379793238.pdfIn PDF document text
    • http://dosatetirudipu.epizy.com/aon_email_address_format_uk.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_off0000bbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB1 5584 bytes
SHA-256: 26ff4f598cf90bfacfa4ade0673d7b5b64461c26f9279230544daa66771fd6e3
font_01_sfnt_off0000ce8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8D 9964 bytes
SHA-256: ccaaf017052904a03169b73cf28b0560a2b813399043a59e678d07289f44a604
font_02_sfnt_off0000f093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF093 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f