Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b365f74965ec9e3…

MALICIOUS

PDF

183.3 KB Created: 2021-02-25 02:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: de878b4a0d5e0f419ffb5658cc8c2571 SHA-1: a51adc6758bf778c1c3129630e0c08d8ade2a5cc SHA-256: 7b365f74965ec9e3bdc8d2e8e029f20f28e6105ee4f86ae1c3374aeeea7524bd
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=behold+it+is+written+in+the+book+of+jasher In PDF document text
    • http://erogan-oficial.site/kaxodejurelemerevuwik1bql.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/mifesevuwarufavupepax.pdfIn PDF document text
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/4428736.pdfIn PDF document text
    • http://findattime.com/duladarejagudedakirixefen5td.pdfIn PDF document text
    • https://vakilonote.weebly.com/uploads/1/3/1/3/131382032/efd6c.pdfIn PDF document text
    • http://afracheat3.xyz/mekeresogovuxae9q3l.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/59027163720.pdfIn PDF document text
    • http://clipshd.design/fafepanupujasidezapoqjb8f.pdfIn PDF document text
    • http://ruszaimclub.ru/nufonugewoniruzis46zo.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/panasonic_viera_television.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laletanegimiw.epizy.com/duxumixowi.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/calculus_the_classic_edition_swokowski_download.pdfIn PDF document text
    • http://medexode.atwebpages.com/85093120341.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/weight_training_routine_for_beginners_at_home.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/64583155390.pdfIn PDF document text
    • http://xitirinajeki.epizy.com/vozejeraxamad.pdfIn PDF document text
    • http://pinopog.rf.gd/holy_spirit_francesca_battistelli_piano_sheet_music.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/nudisu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002886e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2886E 5416 bytes
SHA-256: 2d38c2a914ce8147af90e0e9da15907c4012de4910597e4f45d682c79933d787
font_01_sfnt_off00029ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29AE8 17468 bytes
SHA-256: 095be0f3431e261f251ba501ea23e21c892e08950587eb5570cdfa010d7cc32a

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