Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ad7ab53ac1e3a0…

MALICIOUS

PDF

72.2 KB Created: 2021-03-28 14:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1345f7e78db43b98b8726704c19c4281 SHA-1: a27ba53bdb251fb8ae98345afe98f684979c0552 SHA-256: f8ad7ab53ac1e3a049c08dd5d17f494f454c7768bdebae84af38a0350773b19f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated or use common SEO-like patterns, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=netgear+prosafe+fvs318g+installation+guide
    • https://cdn.sqhk.co/vizodejo/xvHjchb/hydro_dipping_tumblers_with_glitter.pdf
    • https://cdn.sqhk.co/noxisoture/ia6I117/dirt_trackin_2.pdf
    • https://cdn.sqhk.co/gorusuvu/a88gdiP/16975418858.pdf
    • https://cdn-cms.f-static.net/uploads/4499023/normal_602c946225310.pdf
    • https://warimeso.weebly.com/uploads/1/3/4/7/134720830/6900795.pdf
    • https://static.s123-cdn-static.com/uploads/4467926/normal_60058a72ac7ce.pdf
    • https://cdn-cms.f-static.net/uploads/4391954/normal_60504fa8c0abc.pdf
    • https://cdn-cms.f-static.net/uploads/4420608/normal_600b4606a8493.pdf
    • https://cdn-cms.f-static.net/uploads/4496216/normal_5fd98003c9bf7.pdf
    • https://lolijizaw.weebly.com/uploads/1/3/4/4/134461821/luzadot_duxorilobal_fiwolizidej.pdf
    • https://cdn.sqhk.co/vexakebano/0jhkyRi/costumes_near_me_now.pdf
    • https://cdn.sqhk.co/sixitigoxeto/ggxjcYy/75790753465.pdf
    • https://cdn-cms.f-static.net/uploads/4480389/normal_60541d35140ee.pdf
    • https://cdn.sqhk.co/nazalugewu/4Mhahbm/shipping_label_template_avery_5164.pdf
    • https://static.s123-cdn-static.com/uploads/4378405/normal_6008ef96dd0ab.pdf
    • https://cdn.sqhk.co/gugapedulob/iiNbLgc/9515454386.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bd207577-71d6-4e7f-a262-4cf72dac0b83/99666656327.pdf
    • https://uploads.strikinglycdn.com/files/da4fc6af-3288-44b3-af89-b78bc4a0be2b/how_to_install_an_integrated_headset_on_a_scooter.pdf
    • https://uploads.strikinglycdn.com/files/07f96e19-964b-40d2-85d5-7aff861d672d/dafunipexowir.pdf
    • https://uploads.strikinglycdn.com/files/6679b54f-44be-46dd-8bf7-afc6d5b2c4ad/virotilusijikiz.pdf
    • https://uploads.strikinglycdn.com/files/22886914-22b4-4508-a330-f09a08332cdf/aprendizajes_clave_primer_grado_primaria.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc62.bin
d80a478082149cf92dbe8ddd800b14199db2dd6a7fd151fe0c02d770a683aa22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 5648 bytes
font_01_sfnt_off0000efc0.bin
806cca2c33f149be7b78fb96c444a15efb7f155b2124324ace975dc005f27ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 10440 bytes

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