Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ca7c700bc6173e…

MALICIOUS

PDF

72.2 KB Created: 2021-06-01 17:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 18c288990f04b88c193f910c0e22cf48 SHA-1: 5559b3548eadf0591c4f0e8b4ede8b41b707c450 SHA-256: 72ca7c700bc6173e5894b3bb60b2a2cb66272805c336f5a3dd4f5afb891cf833
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to distribute malicious content. The presence of a download button lure and a critical ClamAV detection further supports its malicious nature. The primary URL, fokemale.ru, is associated with cracked software, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://fokemale.ru/123?utm_term=command+and+conquer+generals+crack+1.+8 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377679/normal_5febf74eda347.pdfIn PDF document text
    • https://moxisubisoxotap.weebly.com/uploads/1/3/4/8/134893280/gifaxapaxokakeguxuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_603d4ade3c34c.pdfIn PDF document text
    • https://danimaxo.weebly.com/uploads/1/3/5/3/135388986/nifuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421215/normal_5ff685e3001b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372086/normal_6000cc7d7dbd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_6047a3021e1de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472501/normal_6064d16ab6c88.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/43f59b6b-3e2f-40ac-a06e-6b0ca873b777/sajatogewibajalabapana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4868ad06-54eb-497d-aba9-79896e2da389/funlux_camera_reviews.pdfIn PDF document text
    • http://wepoline.pbworks.com/f/pulefibadaludutigojiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c296154-b0ad-41d6-bc8f-48d689e5dcc8/fawabezupotagek.pdfIn PDF document text
    • http://feteselulo.pbworks.com/w/file/fetch/144441381/yth24k48_oil_capacity.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144422328/anamorphic_lens_flare_plugin_fcpx.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/144448023/58959842890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb856615-3036-4c3d-b8b4-47be4628a544/58402220083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33459dac-d5c7-4796-8634-91db5749e74e/what_is_psychology_in_your_own_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0adb672c-fb42-4d92-8c47-295345ea8c0d/how_to_install_epson_xp-200_printer_without_cd.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144423549/disisinelilugenagen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07678a0a-120a-48e6-b69a-467a3ef1ebea/what_does_jelly_mean_in_america.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB48 5632 bytes
SHA-256: 2fa57e132d001c1c282dcd8159bf022a75e3c87cc11a4cb6ffa327b4ff335fde
font_01_sfnt_off0000ee4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 10828 bytes
SHA-256: bce1b132e1f992ffc13314df0df51a0b3f20ff8af7177b2ada08208c3af7a4bb