Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7016e79514075a…

MALICIOUS

PDF

83.8 KB Created: 2021-09-20 15:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 32e77184cec8e68c995cfae7a8863b0f SHA-1: 407db085844d3dfc7eac4d4cfead8e90ba404795 SHA-256: db7016e79514075a5d72171348f71c57115436951f6b9bf09e4b43c32de62ce9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or redirection attempt. The PDF's structure and embedded URIs suggest it is designed to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=bluetooth+turns+on+automatically+android PDF link annotation
    • http://factorycontrolprojects.com/userfiles/file/74414419132.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/81761522851.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/fomuvefot.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210901080734842.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/rikigabatixulu.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210901_718EE5D5E84ECAB9.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/19926217657.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/81161149888.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/156908a98e5173389f38d196288c679c/komon.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/50336502304.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/86254572135.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb44f4da53---71118668917.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/45043699014.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/gojofawegakusituvaxok.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/58824673005.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/27301534545.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/83951467381.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/rajugasazunudiguzubi.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109141022345687.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/69763146120.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/32401687177.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/fuxewu.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/sekafovusoxozilelewur.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/63575030511.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_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 17892 bytes
SHA-256: fc919b078b1c313cbb152bbf4d2f8fe327b1213c215a77245bee47056485c297
font_02_sfnt_off000127e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E7 10904 bytes
SHA-256: f2ffcf897d08279b5cbe03a9adabbf0a5398abdbec7a2e29b8747345a135b6eb

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