Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce62c99d229cf97f…

MALICIOUS

PDF

73.4 KB Created: 2021-06-14 10:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 078470c18d35681002a7a317a7c706f9 SHA-1: b671663f5927145ef75bec8b556cb91cad8fc4df SHA-256: ce62c99d229cf97f6fbd88224f15dcdcc8cc854afac1fe69bdc98537c12cfd1f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO spam operation. The presence of a URL with 'subway surfers game hack game' in the utm_term parameter suggests a lure for potentially malicious content. ClamAV detection and ML classification further support its malicious nature, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7736

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
  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pistant.ru/pbw?utm_term=subway+surfers+game+hack+game PDF link annotation
    • https://benadegerabo.weebly.com/uploads/1/3/0/8/130874398/3319bb16.pdfIn PDF document text
    • https://rixadoliwuri.weebly.com/uploads/1/3/1/4/131437780/bada5056774fc0.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/5a00b553b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458161/normal_5fdf23516b78c.pdfIn PDF document text
    • https://vezevuxujobamo.weebly.com/uploads/1/3/6/0/136082964/zanetubawitoxivelo.pdfIn PDF document text
    • https://norasavunoga.weebly.com/uploads/1/3/0/8/130874384/62d2f21d2069221.pdfIn PDF document text
    • https://xexunejakex.weebly.com/uploads/1/3/4/2/134266262/1f8c0.pdfIn PDF document text
    • https://bupimapigi.weebly.com/uploads/1/3/1/3/131383283/sofodoludesujonim.pdfIn PDF document text
    • https://sonojija.weebly.com/uploads/1/3/4/7/134723635/lorexamosubip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466666/normal_5fe1359089771.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/3826e22ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_603f50f0442e8.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/8c92d45f-e723-490d-9add-1ae8b3b4849a/buvefumiwudamilali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/916df439-da0f-4c49-9d2a-cef97bb5e31d/porter_cable_compressor_drain_valve_o_ring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638c545e-2b5b-45dd-b478-303909310805/42776065974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c97039-4b2a-463c-94d7-d846e0a3e2ae/what_is_instruction_cycle_explain_with_its_phases_and_flowchart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7755833e-2fe5-42cb-b323-d56b1f200758/radanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6273fd-f055-4712-945b-fccaa1613f0a/2010_camaro_zl1_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1678b432-2c38-4c54-a7d3-ce5405d5e2b3/10921673719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c677df-8990-4865-a99b-2178b3c0ddb5/calligraphy_free_ebook_download_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e34805e-03dc-4e47-9713-bddccfffea7a/wagonemarawesomoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/983178ae-d7dc-4578-9048-1493fcbd195a/viposewoniporinaj.pdfIn 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_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 5300 bytes
SHA-256: d4ca6f075e16bf284dca0f8760167a906cb5552f2ad2c5ee903dd4fdc0676d3d
font_01_sfnt_off000101f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F3 10712 bytes
SHA-256: 8148072d77581b642053a4f4801f04047a227e37d7f8540b8cc78596bccad337

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