Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67ccc0f0ed6b8f0…

MALICIOUS

PDF

103.8 KB Created: 2021-03-16 17:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7a1d2ef390c4760596aa3859a987b1bd SHA-1: a4b45156c420305df1f3cea3c6b60c7f10bda2d2 SHA-256: b67ccc0f0ed6b8f038f956234e4dcd19d49423390c3b9074da7d2427f2665829
204 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically a URL designed to appear as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.
  • 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://crophysi.ru/award?keyword=calidad+definicion+segun+autores+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4424683/normal_5feb888edaf0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485718/normal_5fe00d29d2374.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/avital_remote_start_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389366/normal_603cce37ab6ad.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/WPricW9/game_creator_software_free_download.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/pilanupew.pdfIn PDF document text
    • http://jebumivusesujan.iblogger.org/sasesoxitifonotulonuw.pdfIn PDF document text
    • http://xagixowedobosab.medianewsonline.com/6756775839.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/ihgfjaj/switch_pro_controller_black_friday_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/ximirujusuxo/ght58je/best_skin_care_tools_for_blackheads.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/how_to_factory_reset_a_samsung_dryer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459654/normal_6047c13d0a9ad.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/lg_lfx28968st_water_filter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b02e0ec-9612-491e-87dc-9e1ef53b8a53/mupupatidugesatup.pdfIn PDF document text
    • http://zapavuvezozetet.epizy.com/pc_games_2011_list_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3a2057-c55b-4192-866e-dbf54c9d272f/twilight_breaking_dawn_part_1_full_movie_in_hindi_dubbed_download.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/tekken_7_hwoarang_guide.pdfIn PDF document text
    • http://zamoguwudegovo.rf.gd/53533156500.pdfIn PDF document text
    • http://webifojut.epizy.com/64222357607.pdfIn PDF document text
    • http://litafiwu.epizy.com/thirsty_crow_story_for_nursery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ed0fdb-ff5d-4c51-a637-3282c2118f8f/the_crown_season_5_cast_pictures.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/maplestory_kanna_leveling_guide_reboot.pdfIn PDF document text
    • http://ziboporo.epizy.com/43697797578.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_off000158e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158E2 5228 bytes
SHA-256: 4245d186ac1868151c64e6037bc45d846665736a442681778fb459dd6e0df8d1
font_01_sfnt_off00016aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ABA 11308 bytes
SHA-256: eeb5ede8a7ac1025e392ac2fbe97f5b2e945b2729f3eee13b4a903fb703787f1