Malicious PDF — malware analysis report

Static analysis result for SHA-256 657027bb19ee5a7d…

MALICIOUS

PDF

86.6 KB Created: 2021-03-20 20:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1e3b9def7323f49089de08cc4aed7d13 SHA-1: 4ba24e3b83b6c72ca335f9f7b3ac0f531fabab05 SHA-256: 657027bb19ee5a7d938998ad109ba7e165b2c07d5a59d0dc13352f73284bdfe8
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to a link farm designed to redirect users to other sites. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a tactic to generate traffic and potentially distribute malware or phish for information. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://seumenha.ru/wix?keyword=world+conqueror+4 PDF link annotation
    • https://libirobu.weebly.com/uploads/1/3/5/3/135336219/9188828.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/puzzle_bubble_shooter_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/100s_chart_interactive.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/how_to_put_two_points_into_point_slope_form.pdfIn PDF document text
    • https://napuvenorabinu.weebly.com/uploads/1/3/4/4/134490891/a89cc3afec.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/1rhcigq/thorogood_boots_sizing_reviews.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/nugirazo.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/jijibelugonota.pdfIn PDF document text
    • https://cdn.sqhk.co/lomokubaf/lMLgdDr/zombie_hunter_post_apocalypse_mod_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/bofotabi/yidggnI/foneganiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/54583775464.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_0e17d727b64b4c68855f0339eab4f538.pdf?index=trueIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_e4cf6b6494444bc3a1d815508df8f88f.pdf?index=trueIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_6035e1d3b40d4737bfd8c1a8e3f4b74d.pdf?index=trueIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_fd94270b2f974e7bb137197a43a1002b.pdf?index=trueIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_17715bf8988e4ffe9fffbd51eed016b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a530b4-5166-4c8d-bf47-815fbafe1f9f/fowogudibanovigesuzob.pdfIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_8b6d5d583baf4a31bfcdbbb447f7b445.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aba65b4-a775-45eb-89b3-b396791d7fd9/can_beats_studio_wireless_be_used_wired.pdfIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_62528a53b7554ddf90432fce6f5029c9.pdf?index=trueIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_d4f8007bab6b4b269cf4dcd487d755c8.pdf?index=trueIn 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://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_off0000e950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE950 2960 bytes
SHA-256: 9e8301a812e0963997f2c69c75bfd39e7fcc44359b8a43baf6657440e065e79d
font_01_sfnt_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 4524 bytes
SHA-256: 22e6c05cf05b1dcef691a90a16f6bc35d2e3e898e44a4a5c46022bdc54295c61
font_02_sfnt_off00010331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 10932 bytes
SHA-256: 6c99d3c1a0041feb1a5029f13e795de80a8d5261331bc1f791265e6d1df949f7
font_03_sfnt_off000128f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F0 16248 bytes
SHA-256: 680adc3f4fb4f55b2df6ce4979285ee43951559cccbfe88abd9d1275df552e92
font_04_sfnt_off00013e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E59 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f