Malicious PDF — malware analysis report

Static analysis result for SHA-256 f696ecddf234f8ee…

MALICIOUS

PDF

89.1 KB Created: 2021-09-09 23:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 2cd5ea40f28924fc562c4ef21cd850cf SHA-1: 44e504abbc088a1ec1b48040b217e1a96c232de0 SHA-256: f696ecddf234f8ee3a7635d2749db9aee2dd7da4482c8c102ba93f4da0e6e873
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pixomot.ru/uplcv?utm_term=toffee+for+android+tv PDF link annotation
    • http://dd-eng.com/files/files/38839728424.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/dizewezepe.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/masesoloxeve.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///gukevimogarovezap.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/rufelefibiwupexatex.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/nalejemuzagip.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/bejugarovu.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/62454369251.pdfIn PDF document text
    • http://chinatriage.com/ckfinder/userfiles/files/kowapusupikutuge.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/26511338051.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/potabufubepopetorisukemu.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/vinivogugin.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/vetitep.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/zatosivemuxuriroxinekivi.pdfIn PDF document text
    • http://erimti.com/userfiles/file/2148308010.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/pofamaxefofupitilefut.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/mosam.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/zijadodomazotumepetiwara.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/42488167238.pdfIn PDF document text
    • https://unosms.us/userfiles/file/mutatexedisoduwefat.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/wuliwele.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/setuxopi.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/75338422333.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/61852802661.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_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 20180 bytes
SHA-256: d29b1d8cbb6bea4e172730b3ef359a4bce5ca9c2685d5d284cab5d756e1c0f1a
font_01_sfnt_off00012666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12666 10160 bytes
SHA-256: 45813cba4f48dc992201b36e42238a441dad17aa5deeb56e250a62736cf5f364
font_02_sfnt_off00013d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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