Malicious PDF — malware analysis report

Static analysis result for SHA-256 d544253a48b29564…

MALICIOUS

PDF

121.9 KB Created: 2021-03-14 05:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 15617fdd3c27a72bf0e5e6c63bdd39a9 SHA-1: 232cb4615a8641a8959b83bd47bf67a41d6da7fe SHA-256: d544253a48b29564a82fae318fb4bf5dba1f23ccf27b51e19324e910b364dedf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are SEO-optimized and point to other PDF files, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=texas+commercial+drivers+license+manual PDF link annotation
    • http://gejesixave.scienceontheweb.net/zipazakafeguxefijid.pdfIn PDF document text
    • http://vutanojevi.iblogger.org/customer_journey_ppt_template_free.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/tajodilibawuxosewebibifib.pdfIn PDF document text
    • http://gotifovi.22web.org/harman_pellet_stove_insert_auger_not_turning.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/what_does_genesis_chapter_6_mean.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/90607300160.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_8aecee1cc1c54647a03e09d8f17fa42a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/5644159266.pdfIn PDF document text
    • http://botawaxugeb.epizy.com/scentsy_spring_catalog_2020.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/takodutezafokolamaj.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/kindle_keyboard_user_guide_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/34959678666.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_36665d295dde47f289bbbcd65d3e983c.pdf?index=trueIn PDF document text
    • http://sojisij.epizy.com/91396390264.pdfIn PDF document text
    • http://nupokibe.epizy.com/10961544143.pdfIn PDF document text
    • http://dabevejef.rf.gd/bilijumut.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/pukofigaliviletili.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/hwy_101_north_traffic_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/negociacion_en_el_ambito_laboral.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/renunciation_of_probate_nsw_form_123.pdfIn PDF document text
    • http://pagupugizof.epizy.com/game_guardian_mod_apk_versi_terbaru.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/19381571690.pdfIn PDF document text
    • http://baperosuvo.rf.gd/guzepakuvijubigunixuwakom.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E0C 4964 bytes
SHA-256: 483b09e8e4fd601cd75711c9167ef768afe85136df3cf037e77a4e276b7954ff
font_01_sfnt_off00019ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EC9 12684 bytes
SHA-256: 010309d4d08931c08fe5336532456799a0000ae0715c217656f2e54aac74ab82
font_02_sfnt_off0001c94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C94B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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