Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f953afd44cb675…

MALICIOUS

PDF

73.9 KB Created: 2021-04-23 04:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 882ab12fa68311a88590c0631a5c8708 SHA-1: 7db9dc3fb86b68c073b0af892a95df4983ae2819 SHA-256: c5f953afd44cb6751f0107b220b6e6aadbff4797ccb66f082ce16f7d146018fe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

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://gimoguvi.ru/strik?utm_term=what+does+soft+touch+mean+in+business PDF link annotation
    • https://karesaxu.weebly.com/uploads/1/3/5/3/135392924/1541116.pdfIn PDF document text
    • http://zaxobus.iblogger.org/best_chain_guide_for_1x12.pdfIn PDF document text
    • http://zuwazekanusur.mypressonline.com/54211568470.pdfIn PDF document text
    • https://ledosixekesi.weebly.com/uploads/1/3/4/3/134313849/keduzimuwazak_pekidegisobel.pdfIn PDF document text
    • http://zalavovira.22web.org/learn_apache_web_server.pdfIn PDF document text
    • https://zadisoro.weebly.com/uploads/1/3/4/5/134525292/bimumo-wawas-jivujol-sikusivud.pdfIn PDF document text
    • https://vusubidasezojix.weebly.com/uploads/1/3/5/3/135399418/xikoje.pdfIn PDF document text
    • https://golagunowij.weebly.com/uploads/1/3/2/6/132695575/puzejadixubuwonofupa.pdfIn PDF document text
    • http://gonaxepafa.iblogger.org/working_at_mcdonalds_situational_judgement_test_answers.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/kobavunujewesofinafe.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/present_past_future_tense_words_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davofunup.onlinewebshop.net/dopigulororijufedisejap.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/metal_albums_site.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/biocenosis_significado.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/c._e._c._informatica_srl.pdfIn PDF document text
    • http://tutalisog.rf.gd/daropemifigogisurenut.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/pap_screening_guidelines_alberta.pdfIn PDF document text
    • http://vevotam.epizy.com/bd_chaurasia_volume_3.pdfIn PDF document text
    • http://verejepaw.epizy.com/here_comes_goodbye_sheet_music.pdfIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/do_charities_get_free_postage.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/sikovilufurofigub.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_off0000e3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EF 5288 bytes
SHA-256: ed66b5be0b3049c18f3630cc6441772218143286014976bf75cc11fdbc2f2ac6
font_01_sfnt_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 10788 bytes
SHA-256: 54cde91a3c00ce4d47ca459bca619b6e3fd8f4c7d02e645d207c057740854477

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