Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb82a7b29020a4c…

MALICIOUS

PDF

73.5 KB Created: 2021-03-28 00:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b28dc76968b7a15ed57cd0a6f00805bd SHA-1: c7b0e4963d234d8febf014d999184369744972a1 SHA-256: 9eb82a7b29020a4c1aee3a914c9717470f491879629103a5fac68e68ec75ceb1
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic flagging a link farm and an SEO redirector. The primary malicious URL identified is https://zajinet.ru/123?utm_term=acr+rheumatoid+arthritis+guideline, which is likely used to redirect users to a phishing or malware site. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://zajinet.ru/123?utm_term=acr+rheumatoid+arthritis+guideline PDF link annotation
    • https://fiviwadixuxenel.weebly.com/uploads/1/3/4/8/134854304/3f0c7c86828.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/8282692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486765/normal_6008de6b8d067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408987/normal_604a7ed72fb09.pdfIn PDF document text
    • https://mebotorafegamor.weebly.com/uploads/1/3/0/7/130739377/6363043.pdfIn PDF document text
    • https://wovinimupilof.weebly.com/uploads/1/3/1/4/131453577/9a811.pdfIn PDF document text
    • https://dukalafaziwemum.weebly.com/uploads/1/3/4/7/134772398/b1ef55ae54d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/military_contribution_to_climate_change.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/anime_stars_fighting_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/sakunivepajupufeverir.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/nordictrack_elite_1000_treadmill_review_costco.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/5653253774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fddc5fe9-1ed4-4587-aec6-8aba2874284d/garp_frm_exam_pass_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081c1361-5ee1-4bee-8b02-71334f1bd5b9/miloxupoliner.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/the_selection_chapter_16_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/92050636637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf50710-6a76-451d-8537-6e55615d6870/how_to_make_money_on_onlyfans_selling_feet_pics.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/cleveland_cavaliers_uniform_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/god_of_war_ps4_trophies_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7b222d6-31ef-48d0-8832-bb92dff19ed3/grammar_in_theory_of_computation_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/53308480349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534f9939-e4f3-4350-9d42-be84a3617473/triethylamine_must_be_used_in_the_fume_hood.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/how_to_get_rid_of_hydrogen_peroxide_smell.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_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 5340 bytes
SHA-256: 7131ee9d1f05dc16994d5a42bd9048d5a0e984b8ede84b601ab40c2c4cbef2aa
font_01_sfnt_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 10620 bytes
SHA-256: 0bbf85c1e4380c9cb109befed9f6acbc630b89b18ea906e4c53eed4df7a24d70