Malicious PDF — malware analysis report

Static analysis result for SHA-256 020cd8fd2cf6bda2…

MALICIOUS

PDF

73.4 KB Created: 2021-09-16 23:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c2056e33318bd1ec4e4ff5de733451c5 SHA-1: 23a7190b2174109ed9e6862490ab0a1a5bab46c2 SHA-256: 020cd8fd2cf6bda2be20dfb398f768b201276711ef386e1d102ad149d852a054
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests an attempt to manipulate search engine results or redirect users to malicious sites. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://123podkrovie.sk/editor_uploads/files/jidalula.pdf In PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/fsl7k1du5o1d0jpfldht6u4sft/78557326994.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/51297959532.pdfIn PDF document text
    • https://esvigo.com/upload/files/21385845136.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/viwixunagakunumiw.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/zupanawomapazabafikog.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/dobogotuzuwovosaloxepewo.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613af2e6465c5---vitomoxefupawobesulajef.pdfIn PDF document text
    • http://markone-tools.com/upload/files/jexezapikefasipogon.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/boludetotikafutatodezaw.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/dikuxisitenizoxevexi.pdfIn PDF document text
    • http://haki.vn/uploads/files/88721763580.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/memumajepol.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/wupetom.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/golojovejuzet.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/94576991458.pdfIn PDF document text
    • https://paintingwithapassion.com/nbloom/fckuploads/file/wufaruganugexipiro.pdfIn PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/zolalegovipinonogulux.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/rebaf.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/34594229275.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/11815460421.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/nalesoxiloxetaligo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=henry+stickmin+collection+free+download+android+apkPDF link annotation
    • 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_off0000bb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3E 16512 bytes
SHA-256: 5798d915d29ec3144e1ac3c7a688b20eed93d2891d78449c6b3ac2e706d47ae3
font_01_sfnt_off0000e588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 11064 bytes
SHA-256: e22dac078300aebcc2cfe61fbed62cf9ef2cb73fe2d407a4714c3ef695223a4f
font_02_sfnt_off0000ff5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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