Malicious PDF — malware analysis report

Static analysis result for SHA-256 a624cf571bf35238…

MALICIOUS

PDF

76.1 KB Created: 2021-04-03 22:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0299cb98de9a479a05c5a3496a34ad6f SHA-1: 522d088e014b6dc56683794f23e501ebdebedd0f SHA-256: a624cf571bf35238d62ee8d6a519339a92e1696f6f6e42ee695e0ac6534c1cf8
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-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://druttle.ru/strik?utm_term=is+the+kitchenaid+ice+cream+maker+good PDF link annotation
    • http://bubiver.iblogger.org/silent_night_lds_hymn_sheet_music.pdfIn PDF document text
    • http://vidclips.design/2002_lexus_es300_headlight_assembly222ya.pdfIn PDF document text
    • http://daating19.site/blackjack_odds_guideb3f5n.pdfIn PDF document text
    • http://italystore.pro/78223544473innja.pdfIn PDF document text
    • http://present-mag.ru/1934606840382ljn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455657/normal_6053403c0fad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_603924bc617c3.pdfIn PDF document text
    • http://lotupojaxuvutix.mygamesonline.org/upsc_agriculture_optional_notes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410989/normal_5fc98ca7423bb.pdfIn PDF document text
    • http://zabodolodak.iblogger.org/problemas_porcentajes_para_6_primaria.pdfIn PDF document text
    • https://poxagubojawi.weebly.com/uploads/1/3/1/4/131482812/4339d1f8bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500446/normal_6037d4c26bcdd.pdfIn PDF document text
    • http://teenagetutor.net/will_there_be_a_9th_outlander_bookr0qqc.pdfIn PDF document text
    • https://palelajasirele.weebly.com/uploads/1/3/5/3/135311742/4eda6e78e7da.pdfIn PDF document text
    • https://gebajujevaxudod.weebly.com/uploads/1/3/5/3/135398545/jajeja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380090/normal_5fce88c773571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xasejumav.onlinewebshop.net/fitbit_ionic_user_manual.pdfIn PDF document text
    • http://tiwebukesa.epizy.com/comedy_movies_2017.pdfIn PDF document text
    • http://medipebep.rf.gd/workshop_practice_series.pdfIn PDF document text
    • http://josekopiguvalup.epizy.com/49410985329.pdfIn PDF document text
    • http://mejojaka.epizy.com/accrual_basis_of_accounting.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 5320 bytes
SHA-256: bcb238093eeb3f84bd31962100d6d195ff2d92775d14e8ba61595e10f1da8b58
font_01_sfnt_off0000fe7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7B 10804 bytes
SHA-256: 09b3d85027e7b4ab4a57104d2d8b70512f2ca0f27c80ba624b75bd82571e90ba

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