Malicious PDF — malware analysis report

Static analysis result for SHA-256 f309564cc17aa63a…

MALICIOUS

PDF

54.4 KB Created: 2020-10-01 09:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 227d5764d92be4a58461f355c994c58d SHA-1: f2273bce3cfbd3df75eac5f281d62f759f367cfb SHA-256: f309564cc17aa63a171eeea241f532b54c763837d319e9b10b3b3e84dbfef031
132 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are part of a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?keyword=caselet+di+in+hindi+pdf In PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/88758741181.pdfIn PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/vomexajuzowepu.pdfIn PDF document text
    • https://site-1036839.mozfiles.com/files/1036839/vamexedagikomazaketajun.pdfIn PDF document text
    • https://site-1038653.mozfiles.com/files/1038653/13496998757.pdfIn PDF document text
    • https://site-1039481.mozfiles.com/files/1039481/nirusofenixurafimuroka.pdfIn PDF document text
    • https://site-1038575.mozfiles.com/files/1038575/60374215982.pdfIn PDF document text
    • http://dovar.wasatchmasonbees.com/uploads/1/3/1/4/131438448/mopagujomuzine-puvitomizedijit.pdfIn PDF document text
    • http://files.daviestreeservicesltd.co.uk/uploads/1/3/2/7/132741110/xijibam-gilonotetemutoz.pdfIn PDF document text
    • http://karuf.bucknakedplantmedicine.com/uploads/1/3/1/3/131383314/lolowopemesopu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/26184227670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9562/9725/files/sukoguza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/wuligivewufezefeketutitox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/kinesio_taping_for_tennis_elbow.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_off00007718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7718 4940 bytes
SHA-256: de444b5a749eddbdace8ac268017301222e1b24cea1d26502ca582aea07a4b4b
font_01_sfnt_off000087e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E0 10880 bytes
SHA-256: f62251c4eef8913eb6df22be3a864facf13d5e0efd0c74de7724dba78676c758
font_02_sfnt_off0000acfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACFE 9972 bytes
SHA-256: 6fd964181287fad13a6f1c307903bd64efefaa5383899fb29c845e2eb2047903

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