Malicious PDF — malware analysis report

Static analysis result for SHA-256 c649bac7730d8f7d…

MALICIOUS

PDF

104.2 KB Created: 2020-12-30 10:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1f1730181d776c5950acd7027058b904 SHA-1: 99440271784b8b7e048f6567ad688594bd6fd213 SHA-256: c649bac7730d8f7db2d157f2beafe849261bb470a6449387c6a04abe42aa229e
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with critical heuristics identifying it as a redirector link and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Merge Dragons', directing users to potentially malicious sites like 'gettraff.ru'. No scripts were extracted, but the PDF structure itself facilitates redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 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.
  • 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://gettraff.ru/123?utm_term=merge+dragons+key+guide In PDF document text
    • https://jamitugila.weebly.com/uploads/1/3/4/0/134012499/gitopar_newegixeti_mixuvavabeluz.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/laxopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460450/normal_5fda47648eef2.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/igiaicK/jefopavexesoto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417205/normal_5fe4e774548e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5fb2d938cb95d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f877edab5946.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d3f006c-b687-4884-b14f-b8a53a04404b/cooking_guide_ffxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb733b7-ee6d-42e8-a927-774d5579b453/72603773873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a0a4292-81d1-42ee-a644-954a077f8542/sabatasso_s_gluten_free_pizza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d95f89f-e42e-4805-8694-404526f9e6de/parallelogram_pictures_in_real_life.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/dojas.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/amana_stove_owner_s_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB2 22448 bytes
SHA-256: 74227b904f1e5f70ecfcc4a9cbc43f1d3ff98475c6ef3b8f947d62f7b335990e
font_01_sfnt_off0001455f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455F 5132 bytes
SHA-256: dc07b42fd206721fc784d77543adc3462e420316df08fcd369d855f52d896786
font_02_sfnt_off000156f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156F7 11324 bytes
SHA-256: d93569a8dc29dbc18a19c93cf33108de259f93922b368888b43165d82acb73b0
font_03_sfnt_off00017dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DCB 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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