Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bad55a5b9f18b34…

MALICIOUS

PDF

84.5 KB Created: 2021-02-17 20:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 748505670ba8b9d7127561673af74439 SHA-1: dd612567c3961e5feb7f713cc8acb65934646f27 SHA-256: 0bad55a5b9f18b349b53aec7c1489f0977d7263b495ab2554587e7200b40e373
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It impersonates Facebook and contains a call-to-action button, indicating a credential phishing attempt. The embedded URL `https://baarspo.ru/wix?keyword=showbox+free+apk+2020` and the action link `https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/zedarato.pdf` suggest the document is designed to trick users into downloading or accessing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/zedarato.pdf.
  • 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://baarspo.ru/wix?keyword=showbox+free+apk+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451227/normal_6019286a1521d.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/ahbsjfq/paper_pen_writing_icon.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/eiagdoV/81033803211.pdfIn PDF document text
    • http://simamopi.22web.org/22630632201.pdfIn PDF document text
    • http://xagidodovinudu.iblogger.org/writing_santa_letter_template_free.pdfIn PDF document text
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/zedarato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475715/normal_602a18f00bc53.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/rim8igM/flip_trickster_parkour_simulator_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493549/normal_5fe225529bad7.pdfIn PDF document text
    • https://zogoporev.weebly.com/uploads/1/3/1/3/131381602/rivotomififidi.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/icIqii3/space_sandbox_games_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kazowaz.rf.gd/mikivow.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/cheque_payment_voucher_format.pdfIn PDF document text
    • http://vokotikif.epizy.com/stephen_hawking_books_amazon.pdfIn PDF document text
    • http://rikilusidarule.rf.gd/anganwadi_form_2018_in_uttar_pradesh.pdfIn PDF document text
    • http://fobukisa.rf.gd/vorelovowafiditemivovi.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_off00010fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDD 5520 bytes
SHA-256: 104319827fd369ca5d83b688fc9966aaa9b2ccab065af969773065dfb3750882
font_01_sfnt_off000122b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B0 10028 bytes
SHA-256: 04e93a072545badc56e945d7af7d5f1554f1276bf5f6a4f65d5cbf4916f3dd97

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