Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d11cba2754b508b…

MALICIOUS

PDF

74.0 KB Created: 2021-01-09 17:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 082e8ad262bdcbb751ca532a43d1fb25 SHA-1: 1d70cfe444cc556037416fdc98165915196e2f0e SHA-256: 2d11cba2754b508b2954a852a2549842beae4201a2046e17bc85c5cfb494b4e7
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute traffic to various sites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/aws?utm_term=estados+financieros+proforma In PDF document text
    • https://mapaforidax.weebly.com/uploads/1/3/4/0/134012560/sozerowi-xususelis-gixumepi-miriwodefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488842/normal_5fba3dbe84b8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470683/normal_5fa8e9865f6c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_5fc13c124e376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5fbcc29e5dc4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_5fd0d3af0adb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_5f9199b9e7424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452385/normal_5fe4e04431c53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489981/normal_5fc092f3baa47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fd96a0960b21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f87554a4e212.pdfIn PDF document text
    • https://nujujuzizupefe.weebly.com/uploads/1/3/1/6/131606206/35174e87090ee.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/3b301a6a-6357-421f-b719-be4ab5ac5e8e/finaximapokasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7792575d-d6b0-47ba-b152-8228de1c1671/north_star_dodge_chrysler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e87d5d-78d9-423c-8a6b-caabbfb56cb2/digegalekidofobodokak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca6f542-5d5a-4f1a-83df-72fab5b8be44/locura_de_amor_en_las_vegas_actores.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC3 5228 bytes
SHA-256: c8b958dbe75695b79cbfcc6ec94b1a38868e2f49b35a653a86b056f7f72f7b90
font_01_sfnt_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 11008 bytes
SHA-256: 54ba137487f4849a28de2d2fae50498591b1ffa3afb0a0511929edd83d05d356
font_02_sfnt_off00010585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10585 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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