Malicious PDF — malware analysis report

Static analysis result for SHA-256 4453931f885961d7…

MALICIOUS

PDF

74.9 KB Created: 2021-02-02 22:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: de9e92fa777363991674e13547b64c42 SHA-1: d0df15a27f0ec1eee504bf7f8dbabee0428fd0b6 SHA-256: 4453931f885961d7676c53259705a5638289a1b77eb8075d22a5633f32c405da
254 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure designed for SEO spam and phishing. Heuristics indicate a malicious redirector link and a large link farm, suggesting the primary goal is to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly support the malicious verdict, indicating the file is likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://yafferge.ru/wb?keyword=avatar%202%20full%20movie%20%20300mb In PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/rimarasuvug.pdfIn PDF document text
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/satojijumava-tamexo-zovinomabiko.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/fGpznmN/stack_havoc_ball_free_robux_roblominer.pdfIn PDF document text
    • https://cdn.sqhk.co/tewisifupib/wgfHhih/jawofufogufegez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489977/normal_6009778d208ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421957/normal_5fcdf83bcd087.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406454/normal_5ff79bbc0b5ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417140/normal_5fe884163ee77.pdfIn PDF document text
    • http://widevuvi.22web.org/peak_performance_vinterjacka.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/lomiwexuva/carotid_artery_disease_management_guidelines.pdfIn PDF document text
    • http://moliwofasekimu.epizy.com/bitabegufuvugo.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/department_head_interview_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/autodesk_apk_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/1867949201.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/palayathu_amman_movie_songs_mp4.pdfIn PDF document text
    • http://rasunafosav.epizy.com/66745503730.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/33932784067.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/glencoe_algebra_1_answer_key_chapter_4.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_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 5364 bytes
SHA-256: 728aaa34a03374237455b004fcff372bc67298d2066c08cbacdd2bad58e82bb5
font_01_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 10432 bytes
SHA-256: 556676bcb2e6a58fa1946fe9bbf4fbf3627e26cd4224e915c50271a3ec3d840e

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