Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f0c9a4d5a4578b…

MALICIOUS

PDF

72.5 KB Created: 2021-02-10 16:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 62dd64e2a66fc08cf00033a6a6362402 SHA-1: 26426d925384e2a1926712e66023f792e3ef5599 SHA-256: 56f0c9a4d5a4578bf914c03c83bfb1a48b0def0f9dd9710d434e3841de5f135f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent example being https://maypoin.ru/123?utm_term=used+tv+price+guide, suggesting a phishing or credential harvesting attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, further supporting the malicious intent of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=used+tv+price+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459028/normal_5fe76a765c5ed.pdfIn PDF document text
    • http://poxiror.22web.org/rufewokakikevilox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fee1857e28c9.pdfIn PDF document text
    • https://molobaguzali.weebly.com/uploads/1/3/0/7/130739923/ribetu-memujinunade-dabot-zelaxedizorub.pdfIn PDF document text
    • https://zidimegaga.weebly.com/uploads/1/3/0/9/130969389/4644209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485322/normal_5ffe81edce0ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_5fd9269f76ef1.pdfIn PDF document text
    • http://nulonelam.66ghz.com/seven-_eleven_japan_co._ltd_annual_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418570/normal_5ff5dacc76391.pdfIn PDF document text
    • https://rudozusaviso.weebly.com/uploads/1/3/4/0/134041113/8813308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459325/normal_5fc603b213b52.pdfIn PDF document text
    • http://nofovukad.iblogger.org/atkins_20_phase_1_food_list.pdfIn PDF document text
    • https://://////ADT3MDthcHBpZD15dGFjaHlvbg-/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sudolurimav.epizy.com/gba_emulator_apk_here.pdfIn PDF document text
    • http://xirasajizobopa.rf.gd/sujijekefuzumaxogafewasa.pdfIn PDF document text
    • http://gezogiz.epizy.com/apprendre_python_pour_les_nuls.pdfIn PDF document text
    • http://duzesonugineku.rf.gd/reduce_smaller_size.pdfIn PDF document text
    • http://zovitox.epizy.com/adagio_secret_garden_violin.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_off0000dcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 5048 bytes
SHA-256: 78ab81cc56daa013ad7c50c8953a3bae92c9a59436f73e4f2a4bd927d7bdee62
font_01_sfnt_off0000ee43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 11912 bytes
SHA-256: a2c2b031f46d5a8d14a75b48a504c666086b76847be33c0ed3b13bb4a61e51cb

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