Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f3ed1855d3f6b1…

MALICIOUS

PDF

74.4 KB Created: 2021-03-14 12:03:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d7277acd1262fa6454e4f15fb75dd269 SHA-1: cb436302172a1e19e04e78298fd0aae471426b81 SHA-256: 75f3ed1855d3f6b1a07eae4098899d0b0f6113a22404f8e5d860e0e9e9c39287
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized PDF files, suggesting a link farm or phishing campaign. The primary lure URL, 'https://botokaw.ru/wix?keyword=kittery+school+district+jobs', is presented as a job search result, indicating a phishing pretext. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=kittery+school+district+jobs PDF link annotation
    • http://widonatozeg.mypressonline.com/arduino_mini_pro_schematic.pdfIn PDF document text
    • https://lekifusa.weebly.com/uploads/1/3/1/3/131382118/4413010.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/duracell_cef_14_n_nimh_battery_charger_instructions.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/love_yourself_trumpet_solo_sheet_music.pdfIn PDF document text
    • http://sukuwodexi.scienceontheweb.net/photosynthesis_and_cellular_respiration_worksheet_answers.pdfIn PDF document text
    • http://dunodipike.sportsontheweb.net/is_it_safe_to_breed_two_dapple_dachshunds.pdfIn PDF document text
    • http://lamejix.scienceontheweb.net/cambridge_english_practice_test.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/creative_sb_x-fi_driver.pdfIn PDF document text
    • https://fumubesoxumus.weebly.com/uploads/1/3/4/4/134485348/bupovinejese_benanutipuk_ramekijeru_govoredezajugam.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/sesijesule/88717246843.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/69106450542.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/85414452199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c756b5f-0308-432c-8d77-7d99811460ee/time_clocking_systems_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10bbb52f-7d50-47bd-8316-d39b61924d10/tinuk.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/90758677719.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/katexisolijowabexa.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/chak_de_india_movie_website.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/du_b._el._ed_application_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/sabevutedetimagakadig.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/bahubali_4k_movie_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/mas_outsourcing_guidelines_consultation_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f9c9b8-330e-41f4-acfe-a334c3a1b2df/maschine_mikro_mk1_review.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_off0000e7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C9 5104 bytes
SHA-256: f685a6a317563de4e7bba54c19eb9273bb91fe94cd1b565aa67c6994678a70f9
font_01_sfnt_off0000f92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92E 10420 bytes
SHA-256: 657bc9c98a153de740612988bf2d99b5215e432740affa24d14e19f07ecfa3ad