Malicious PDF — malware analysis report

Static analysis result for SHA-256 243f51bb394bd447…

MALICIOUS

PDF

79.0 KB Created: 2020-12-23 07:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0fba7b200da3a0c7436b49f3b29c7650 SHA-1: 151e8410838a5fdc1e427ae06cef3b8976b9d9b3 SHA-256: 243f51bb394bd44715f85a3dd09953cf20afe092460b9b27c8de48a26a46c02d
276 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains heuristics indicating it's part of an SEO link farm and uses a redirector URL, likely for a free-download phishing lure. The document body, though heavily obfuscated, suggests a social engineering tactic to trick users into executing commands via the 'ClickFix' method, potentially to download a second-stage payload from the identified URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://traffset.ru/strik?utm_term=itunes+mobile+device+helper+windows+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f93940d9bfc6.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/best_movies_on_netflix_2020_kids.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5fa5dcc7dff95.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/3161006663.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/zumababubosa.pdfIn PDF document text
    • https://serorufadorulu.weebly.com/uploads/1/3/1/4/131483245/tadenudukikavo.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/xuvibefibusakewaxadel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/879c265e-db0b-4308-ae29-81d17978111f/midobol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bee8e4a-e4e4-4d2e-8068-308a06c225d0/snow_emergency_levels_lucas_county.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68aaccf8-9167-462d-807c-0a3286652924/total_drama_island_porn_game.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1116c11f6a41984869c2f/t/5fc187e73485235c8600d909/1606518760422/shriners_gun_show_jackson_ms.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69E 3784 bytes
SHA-256: 23b5b1b679e74f7dadf732e2dc05eff208901744a39fec1a5cc210e509d9471a
font_01_sfnt_off0000d41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41F 5524 bytes
SHA-256: d626aa817fd393627a4db89feaa15a1a81a6ca5f9355fbee8f2117b3f8fe8c09
font_02_sfnt_off0000e6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C6 5672 bytes
SHA-256: dbfa5413c1a9c227ff4952054b5b0b4ac96982f99bb483e8315c477d4481d2cf
font_03_sfnt_off0000f4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D5 10640 bytes
SHA-256: 4498a6c65c86353cda2c92bc411be2af323969fd960439db660ba171fa55abd2
font_04_sfnt_off0001196f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196F 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61