Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf420b93b7ba03a…

MALICIOUS

PDF

135.1 KB Created: 2021-04-05 02:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ac8c9ef612e2a0c66d6ceb8b3e544cc6 SHA-1: 7ec9f4d71706e9955c50a7df726db2d1945187e7 SHA-256: bcf420b93b7ba03a2f8d72e90df3c32df2b6bc8e863bf33f418d543afa01879e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The document contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The presence of external URIs and the 'link farm' heuristic strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • 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 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://zajinet.ru/aws?utm_term=give+at+least+5+words+that+appeal+to+the+senses+the+sea+brainly PDF link annotation
    • https://cdn.sqhk.co/wofazexej/aiRTQhc/tobovujilijopo.pdfIn PDF document text
    • http://gewusoluxul.scienceontheweb.net/cations_and_anions_list_with_symbols.pdfIn PDF document text
    • https://cdn.sqhk.co/xamowepap/jhujEgc/american_racing_dealer_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugituxi/fgiigjd/word_search_online_free_puzzles.pdfIn PDF document text
    • https://cdn.sqhk.co/rasidepad/I9UeLib/16297578626.pdfIn PDF document text
    • https://cdn.sqhk.co/mosizuwowux/jflMYTn/kapoluralomibawukelot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497650/normal_6003e1334f353.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/fifty_shades_of_grey_actor_name.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_60634a10551a4.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/93200771328.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/fgjjejc/barbershop_2_back_in_business_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/hj8ifRa/loxamikabegurubalezubigus.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/gfgfDgg/rififokozedaturuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387241/normal_6042fc658724a.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/bYie8jj/track_twitter_followers_over_time_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_6014487910613.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/economist_14_july_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451760/normal_5ff015ab4ed68.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/funciones_de_la_barrera_hematoencefalica.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/werajezib.pdfIn PDF document text
    • http://raxuzogigegekaj.66ghz.com/nasoxakewibavep.pdfIn PDF document text
    • https://cdn.sqhk.co/rufetuzek/hdeWqih/93785647089.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/kenogugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fomepufasele.atwebpages.com/62588197677.pdfIn PDF document text
    • http://pakapenabu.atwebpages.com/you_are_the_reason_lyrics_download.pdfIn PDF document text
    • http://dimarujevetuvif.epizy.com/callaway_xr_16_driver_adjustment_guide.pdfIn PDF document text
    • http://bolopanezodubun.rf.gd/69067116442.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/arabic_alphabet_writing_practice_book.pdfIn PDF document text
    • http://volarudene.epizy.com/52608440665.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_off0001d133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D133 5596 bytes
SHA-256: 0d5ebe1e69ffba63cf0e659c6431846b43be768fb241f22d892f5fbe2c0d09fd
font_01_sfnt_off0001e44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E44F 12340 bytes
SHA-256: 2614130489a5caf54186b44ecf4d1201421d71219e6597d37645daca28c84986