Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30ea3d46948b336…

MALICIOUS

PDF

76.5 KB Created: 2021-02-19 21:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 95ff2e4cc71324b7fb2c9bbf89e2d561 SHA-1: 9621f2f270c49cfd1f2d5c32e742a402c9987330 SHA-256: f30ea3d46948b33640369cbebea5c4bd6640e919ee05ea2d88cab7669c9063e0
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 0.9998

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://baarspo.ru/123?utm_term=raymarine+e80+operation+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379045/normal_5fca87a87723b.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/5MgibFe/xubevuwutiwin.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/igjizij/67104085231.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/jiicntW/66844402663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457868/normal_6002552c23300.pdfIn PDF document text
    • http://sewaseg.22web.org/dudikesiwewigeduxod.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/gjr8Zjs/days_cash_on_hand_hospital.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://legujajojozete.epizy.com/facebook_ads_reporting_google_sheets.pdfIn PDF document text
    • http://diturasenupope.epizy.com/dolamigejejinidapolo.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/89479550101.pdfIn PDF document text
    • http://xokifanubede.rf.gd/tobolabotavanunubawaw.pdfIn PDF document text
    • http://zukovijaxi.epizy.com/vuxufa.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/fegifijazuwuxafurazufik.pdfIn PDF document text
    • http://tazefuwavubu.rf.gd/gndu_date_sheet_ba_3_sem.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/a_d_m_o_full_form.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_off0000df81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF81 5112 bytes
SHA-256: bdc691f64fa21d6bdee071616d1d8a3d6721f1b6dbf31cafd88a91ae5ee44897
font_01_sfnt_off0000f0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CD 11140 bytes
SHA-256: f38b0b068c0a44a7b3f8e72c44e7adb42b5821d1fc0aba2be3cc6128c05f2857
font_02_sfnt_off000116bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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