Malicious PDF — malware analysis report

Static analysis result for SHA-256 2103c4d4680af1e7…

MALICIOUS

PDF

76.3 KB Created: 2021-02-24 19:02:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5a1a6c487dc84959faa2fefef969d586 SHA-1: 71e8f85d588e5d91cdb51304aeb9bd7267209403 SHA-256: 2103c4d4680af1e7bcf6c66c1c6056d8b8b0fb96785f65144f2ceca404f6a3ee
192 Risk Score

Malware Insights

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

This PDF document contains a lure related to Samsung filter cleaning, directing users to a malicious redirector URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of malicious redirector links and the overall classification suggest the document is designed to lead the user to a harmful site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://crophysi.ru/award?keyword=samsung+wf42h5200ap%252Fa2+filter+cleaning In PDF document text
    • http://submonster.xyz/966028124044yiu5.pdfIn PDF document text
    • https://cdn.sqhk.co/duzupafuj/eAhgrjc/wewiposepi.pdfIn PDF document text
    • https://cdn.sqhk.co/wetabupi/f0jitq0/lupoko.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/aetghPh/tonefigesenuzuzaw.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/gcjeqja/kukemadabenirol.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/PgelbN7/setotedutakutejebolazop.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/ig5idqb/multiplayer_online_racing_games_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/gcjf4gj/family_mysteries_poisonous_promises_download.pdfIn PDF document text
    • https://cdn.sqhk.co/posuwumujome/hbajc7w/flipkart_careers_candidate_login.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/iaCUrep/earth_3d_globe_map.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/idX56gg/80659947576.pdfIn PDF document text
    • https://cdn.sqhk.co/xixewebirike/lTjjUte/54617620087.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/aiTidij/72883508424.pdfIn PDF document text
    • https://cdn.sqhk.co/xanapaje/fijigBO/jakigojoxolemova.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/hDhgagh/kobug.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/igig3hg/bloomscape_house_plants.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/bWNkRdS/14030213564.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B71 6148 bytes
SHA-256: 29fba8374d19b2d0892ff34836f6d920ac2165f05a0e4a2f363ca7da99d1ebae

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