Malicious PDF — malware analysis report

Static analysis result for SHA-256 4acff2a7563f981c…

MALICIOUS

PDF

75.2 KB Created: 2021-03-04 02:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a7bd0e5d79d1865ba7ec7b290398e065 SHA-1: 6febab503a7928202f98fb849b1e3296e598afc3 SHA-256: 4acff2a7563f981c2a579ffb7b69d755f4e1ce09c92c10f9da6e707349dc6179
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to disposable hosting, and heuristic analysis indicates it is a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/wix?keyword=chapter+10+and+11+biology+test+answers PDF link annotation
    • http://es50off.pro/gedagipodigowigarotuuiojn.pdfIn PDF document text
    • http://fragcups.com/zakonelexafimepofomunve6l.pdfIn PDF document text
    • http://tikonazab.iblogger.org/53539283951.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/35326761684.pdfIn PDF document text
    • http://barbanapoli.moscow/how_do_i_reset_my_viper_alarm_without_a_remoteb6kgl.pdfIn PDF document text
    • http://marafonsport.site/problmes_multiplicatifs_ce2__imprimervgrpr.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/craftsman_dovetail_jig_review.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/lofogarawulozuzulike.pdfIn PDF document text
    • http://tojipipawerar.22web.org/82729783426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satuwegalenez.epizy.com/68773506896.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/equivalent_fractions_grade_6_worksheet.pdfIn PDF document text
    • http://rapuzivawa.epizy.com/beaufort_county_tax_assessor_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/33031180689.pdfIn PDF document text
    • http://nemunuj.rf.gd/bolo_de_chocolate_nega_maluca_forma_grande.pdfIn PDF document text
    • http://mapexas.epizy.com/cymera_app_for_pc.pdfIn PDF document text
    • http://jufakoxageponuz.rf.gd/xosobev.pdfIn PDF document text
    • http://latajixow.epizy.com/71413473561.pdfIn PDF document text
    • http://mikesivu.rf.gd/77366945041.pdfIn PDF document text
    • http://goduzidexemave.epizy.com/due_diligence_report_in_arabic.pdfIn PDF document text
    • http://rakukofikojoku.epizy.com/wenuvupinegaju.pdfIn PDF document text
    • http://redepulevinevux.epizy.com/xivotakelisejarabawe.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/microsoft_bopomofo_ing_language_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/26466968580.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/danegeluxabona.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_off0000e84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84E 5656 bytes
SHA-256: 987a164139918fcbada20ab7fcb945203841e3cc7896848f6ad3af714ccc308b
font_01_sfnt_off0000fb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB96 10336 bytes
SHA-256: 9a69728921bd64dda65793b396744c920f1bb1c89a3517e38cab715edece963e

Open this report in the interactive analyzer, or submit your own file for analysis.