Malicious PDF — malware analysis report

Static analysis result for SHA-256 2970a54f5c3da813…

MALICIOUS

PDF

101.6 KB Created: 2021-09-13 03:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c69f1717509895f1dfd9dc9f6f330f47 SHA-1: c4310d15d207e662323632c59b6e7ba6fd778e85 SHA-256: 2970a54f5c3da81390636a794092af9fb13bdb80ce5c372f8f81f759e21352dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded URLs pointing to various domains, many of which are likely disposable or used for link farming. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan delivery mechanism. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://crysiq.ru/uplcv?utm_term=demon+slayer+mugen+train+2020+full+movie PDF link annotation
    • https://ibextrail.com/editor-images/foxerenudub.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/33257629119.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/mexaxozegaripifuxapeb.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/kuxodumuxawibujufasurefo.pdfIn PDF document text
    • http://lagrupacio.cat/file/kidozifomoloxefikurudu.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/makoxiwibanogesowovuk.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/88170793374.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/99334106580.pdfIn PDF document text
    • http://letdentalab.com/img/files/sesemegilelix.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/14206868153.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355a17775bd---tosefoduz.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/zujiragejuramasevagazifu.pdfIn PDF document text
    • http://getdol.com/page_data/file/77480510420.pdfIn PDF document text
    • http://abnicum.ru/files/file/95692969518.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/94070007106.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-11/20210911181541903085.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/vozamigevodajaremafidifef.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/jituwakexafijapoxitoloj.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/vefilivopo.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/41797609935.pdfIn PDF document text
    • http://steinemann-ag.ru/wagajasopoxesipubuvapiv.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/luwukidizawirawuvoxitaxo.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/96168838533.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001171a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171A 23976 bytes
SHA-256: 497933bba297fe297f035fe815ea9c1e0f35586fd5ba5d7199aba71428f6ace4
font_01_sfnt_off00015683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15683 11080 bytes
SHA-256: e0cc94c09c9d5977f94e201748556d8d99b96fde712b6c0fb2c7b84fdb3ee11c
font_02_sfnt_off00017072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17072 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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