Malicious PDF — malware analysis report

Static analysis result for SHA-256 02feb37a58387993…

MALICIOUS

PDF

74.0 KB Created: 2021-03-03 01:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: be6559127f41626a53bc265d189c28bb SHA-1: de837064fb2b966784028b8ff0e9b1ff4dbe4abc SHA-256: 02feb37a58387993b8205f865b44ae4e82321a140246b8fab1fbb66d7e85a51e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, including one pointing to 'xajibur.ru', suggests a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to redirect users to multiple potentially malicious sites hosted on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/123?utm_term=everyday+use+flat+and+round+characters PDF link annotation
    • http://folejaf.mypressonline.com/kikatuwavube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489429/normal_6012cbc72719e.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/brandsmart_outlet_in_griffin_road.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451566/normal_600e59984a3d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_601d674b32178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_601fd1f6d9d18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465537/normal_5fc975d9bd436.pdfIn PDF document text
    • http://xuribof.medianewsonline.com/towud.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/honda_eu6500is_battery_cover.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5fd3122628725.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/19501702326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_5fdc43668c59a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473062/normal_5fff7583ea408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_5fd3d557b0dd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_6035ce4a0af08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gofemotomikuroj.epizy.com/60479767179.pdfIn PDF document text
    • http://tujulerika.epizy.com/bisagegipefij.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/kemeburukis.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_off0000e2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F7 5228 bytes
SHA-256: b108924c0c120b500387cb84557da0a7c09237957add2939cfa8fff5b692a83e
font_01_sfnt_off0000f4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CB 10588 bytes
SHA-256: 8a280101f4e6843e90b71ea250b3bd0c4825dae592ac8247845d359b593f35eb

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