Malicious PDF — malware analysis report

Static analysis result for SHA-256 6069e2e89784bb86…

MALICIOUS

PDF

83.5 KB Created: 2021-09-09 07:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6411485be479cfc71584ef9ca6da71bb SHA-1: b27fb1d86d84d4cd53f2e7f29b87fb9dfd89c391 SHA-256: 6069e2e89784bb86275ddae1c13cbd7c1b85e227ee521cf346bae088ad7aa29f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristic analysis identified it as a link farm with numerous distinct hosts, indicating a potential phishing or malware distribution scheme. Although no executable scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://satisfytech.com/ck/upload/files/19255334647.pdf In PDF document text
    • https://gea99.com/ckfinder/userfiles/files/metalufemokuzip.pdfIn PDF document text
    • http://northcity.rs/slike/files/43503233805.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/wajemolunekazajepamafa.pdfIn PDF document text
    • http://thanhcongtechtra.com/upload/files/pesufisunazezodobarejinad.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/sajenokamogilu.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/tujukanavukidosuzeja.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/87975446417.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/805cbb9431973b95e8d5283a6a75cc5f/xolagebukuwaxivujumolok.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/49184939095.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/xerexar.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.com/userfiles/file/87644133153.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/46951816061.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/dogetideponunetes.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/15050790713.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109041216213747.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3a23ebc4e---muzerifi.pdfIn PDF document text
    • https://jin-ji.com/upload/files/lulawaj.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/92300203550.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/fujanekuvukederufibaril.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/jutasa.pdfIn PDF document text
    • http://tapestry.cz/images/file/files/43278581208.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/bazon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=latest+android+version+lollipopPDF 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_off0000df43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF43 18840 bytes
SHA-256: 7eee0e72618ab7a9929b529e8ea97e0b1fd6ea8882a0cd515afe56953ff26e3c
font_01_sfnt_off000110c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C9 10408 bytes
SHA-256: e1a0baf6658a765d8c8403e07222cda7e31fd1a04a042a38837ddbc5db6930e8
font_02_sfnt_off00012878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12878 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1