Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f50dfaacbc4826…

MALICIOUS

PDF

72.1 KB Created: 2021-03-13 15:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b56e2022bd34a7972441caee633b38ac SHA-1: 232695a69db2218c2678a4e396497e6cd79df11a SHA-256: 69f50dfaacbc48260a3b1420c0e4acfe3f9f96037c0e871e4a0ea6593ad322dd
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary suspicious URL identified as 'https://maypoin.ru/wix?keyword=ccna+routing+and+switching+lab+manual+pdf'. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://maypoin.ru/wix?keyword=ccna+routing+and+switching+lab+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/keliziniw/qhcgjhh/sijaz.pdfIn PDF document text
    • http://libotopatolar.iblogger.org/adobe_creative_suite_3.pdfIn PDF document text
    • http://xamejaduxak.22web.org/bal_hanuman_3gp_cartoon.pdfIn PDF document text
    • https://luvalebasewe.weebly.com/uploads/1/3/5/3/135326782/puditokura.pdfIn PDF document text
    • https://cdn.sqhk.co/kafodarifab/hgift7M/swahili_worship_songs_mp4.pdfIn PDF document text
    • https://dajepulexito.weebly.com/uploads/1/3/4/5/134591334/8474693.pdfIn PDF document text
    • http://mojoliziriba.22web.org/double_down_kfc_calories.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/lefox.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/herjgii/29156154428.pdfIn PDF document text
    • https://bopuxokefira.weebly.com/uploads/1/3/5/3/135300507/giveravum_notezofu_jejil_kebik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mujesogi/waxowamopidisip.pdfIn PDF document text
    • http://dogekozi.epizy.com/jilus.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/41213929064.pdfIn PDF document text
    • http://wukigolotere.rf.gd/7_day_mental_diet_youtube.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/pofixofamufopuza.pdfIn PDF document text
    • http://nexofemexer.epizy.com/gst_full_form_meaning_in_marathi.pdfIn PDF document text
    • http://jedolup.rf.gd/building_and_structural_construction_n6_notes.pdfIn PDF document text
    • http://xewenofos.epizy.com/analogy_mcqs_with_answers.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_off0000d9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D4 5708 bytes
SHA-256: 17f255e4236f47327ab586eceb95411b893d42b2b7a55c47ab7dbadadc2714c2
font_01_sfnt_off0000ed1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 10552 bytes
SHA-256: c47f76e81bdcf0dfc804c98834c71bafd1a0eafe360807a95722854942803489

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