Malicious PDF — malware analysis report

Static analysis result for SHA-256 77dfd28459ff552d…

MALICIOUS

PDF

69.7 KB Created: 2021-09-18 08:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 07e2ccc072d20b8385e44713b094c120 SHA-1: ba33ee6a05287c945f9c38186839a8f760c92d5f SHA-256: 77dfd28459ff552df064e6e5f10c6bd4a978bbd9b180c746d2735818ba647a4d
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://philabc.ru/uplcv?utm_term=pure+cleaner+apk PDF link annotation
    • http://galeriejacqueselbaz.com/userfiles/file/23351507643.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/xemelo.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/diboxokej.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/41972228708.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/79739786249.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/loxewopiwat.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/44273030865.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/81786461590.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/51614677373.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/6086943348.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614563bf1d9e7---56483373738.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/luritaluzukatobepexigewom.pdfIn PDF document text
    • https://cuatudongnhatrang.com/uploads/files/vitelevajopusenudamuxupe.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-16/20210916194808565442.pdfIn PDF document text
    • https://trieurodata.ro/images/file/supunufebalesuxitedur.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/kopekopi.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/4493de641203b00020cd1da6b399a7b1/54250136435.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/95522747952.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/livabi.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/fotomuxekif.pdfIn PDF document text
    • http://0851gay.org/userfiles/202109file/2021091404215770554.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_off0000b1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F6 10084 bytes
SHA-256: 3c5ca9c8d0ca69c1430d7c186d4b30c469fe1adc307c1fafc6ff340ad2865995
font_01_sfnt_off0000c881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC881 15932 bytes
SHA-256: c67eaaf742667778b8b0f07f5246635c6d536c77c3136dee2d1dbb1d1dc2b327
font_02_sfnt_off0000f1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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