Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a06ef2b6b4bae96…

MALICIOUS

PDF

70.1 KB Created: 2021-03-14 20:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 072300f9aafa42d12912c008988d1053 SHA-1: 88b9ed11d6176d7cf6428bf4d1a39f507d4421fd SHA-256: 9a06ef2b6b4bae969bff4e19ae6ecde3289fc7347e466ef59354737b77376432
166 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs, one of which is associated with a link farm on disposable hosting. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to decrypt a password-protected archive, a common tactic to evade gateway scanning. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the presence of external URIs suggests a potential download or redirection to malicious content.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/strik?utm_term=jon+duckett+php+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5ff2875de098d.pdfIn PDF document text
    • https://cdn.sqhk.co/kodivitedi/63CjfGW/bengali_to_english_offline_dictionary_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/jygehdg/learn_thai_with_mod.pdfIn PDF document text
    • http://easterthjg.com/13241546091l05ee.pdfIn PDF document text
    • http://bluetea.space/zach_stop_vine_explanationbll56.pdfIn PDF document text
    • http://design-kvartira.info/maytag_neptune_washer_not_starting7ci0n.pdfIn PDF document text
    • http://form-copyrightservices.com/examples_of_rhetorical_devices_used_in_i_have_a_dream_speechac8xz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500878/normal_5ff4121f8f1ac.pdfIn PDF document text
    • http://reduslim-ufficiale.website/chirutha_movie_songs_lyricsmr7si.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/rirusozo/how_to_construct_income_statement_forecasting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b6dbda-6388-47b3-bb2b-3ff01a6cbff2/taking_sides_clashing_views_in_world_politics_18th_edition.pdfIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_074cc9cf3f1242aa9e5ebfd12390f3dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59c58e4-a2d9-414b-9347-e0f64505eb2f/7852109733.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/47268998532.pdfIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_764602710c8241d5ace413c19cad2e31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/breville_cafe_roma_coffee_machine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43424a4b-bf41-4e85-9105-67780ecd2375/roland_td-30_v-drums_kits_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e569b8-a671-4e8d-b5b7-ee556bbaa88d/lodeza.pdfIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_64ebbcbed6ff4f4c85ef43433da8b01a.pdf?index=trueIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_b086ec6bdbda4ea7acdfd42645c9e752.pdf?index=trueIn PDF document text
    • https://downloadpdfone.blogspot.com/?sale=1119149223In 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_off0000d65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65E 5112 bytes
SHA-256: 0c0f15ef7edf563ca20d94f75741099e31f73b61bfb95856d5ba0624a5acb8b0
font_01_sfnt_off0000e7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 10440 bytes
SHA-256: 4d81a6761146f7bab1df552e68dce62c2dd38d6f9a84ac455b12051f9a51d142