Malicious PDF — malware analysis report

Static analysis result for SHA-256 902237ac7b55bd51…

MALICIOUS

PDF

81.2 KB Created: 2021-03-27 09:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 72934f33db28a18011e9415a449cd478 SHA-1: b626bfc2e5f04e2cab6ae9facf18ece1d6664bb6 SHA-256: 902237ac7b55bd517bd149413c657f7becb9b4263e7730669e4a0bd4a0009d09
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file, identified as malicious by ML classifiers and ClamAV, contains a significant number of external links, including a large link farm, suggesting a phishing or SEO manipulation tactic. The document body, though heavily obfuscated, contains metadata related to 'renewable energy sources seminar pdf' and the authoring application 'wkhtmltopdf', indicating a potential lure. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://leonvi.ru/award?keyword=renewable+energy+sources+seminar+pdf PDF link annotation
    • http://raxawevamavox.getenjoyment.net/aristotle_s_theory_of_poetry_and_fine_art.pdfIn PDF document text
    • http://flowerport.store/singer_heavy_duty_sewing_machine_bobbin_casefij0d.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/bosch_pbh_2100_review.pdfIn PDF document text
    • http://bionatur.space/mozidokokabibebufasosazrcdrk.pdfIn PDF document text
    • http://xifasiv.getenjoyment.net/administrao_de_produo_e_operaes_correa.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/nunakixuma/the_lies_of_locke_lamora.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/windows_server_2012_r2_standard_oem_iso.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_cdc915a372d44e5592f65e2c84ed177f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e2e5ee-c6b2-4d3a-8f59-95b92f0085ff/beats_by_dre_studio_wireless_monster.pdfIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_5dbbca658d794d5eba717f044b2dd2a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/24116720230.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/fate_extella_link_achievements_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066f0459-e916-40d9-9fcf-c423fa8a8508/why_isnt_my_dishwasher_getting_my_dishes_clean.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/game_archery_king_mod_apk_terbaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a3972c-0449-45f4-9bea-a268e8b9eb4e/skyrim_special_edition_guide_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/tisogemozuzepobi.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/odia_movie_ajatshatru_all_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c46ef7cf-70d1-4355-988e-af4a18edd1e7/tukegeraxuduxede.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC64 5816 bytes
SHA-256: e33b2c5f35036a10e5b10024c0760e750001bf604fe1e70e997c04d3bdd02597
font_01_sfnt_off00011038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11038 11560 bytes
SHA-256: 8c8c92334fd74eded0c602cbb426970469034703999e5ad1afe646d0c92e1bda

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