Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c63ba01cd95981a…

MALICIOUS

PDF

81.5 KB Created: 2021-03-14 07:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e863895ad145355d0cd03fd2d0f017ae SHA-1: a4b3b17dfb6f6d5f94c9e265207bba93378a7bf4 SHA-256: 7c63ba01cd95981a4c8d0da8cd4c2f5ce12fe8de7ddf7bdfc80763684fa4bb4c
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to exploit users through a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/award?keyword=clock+time+in+english+pdf PDF link annotation
    • https://vewudati.weebly.com/uploads/1/3/0/8/130873955/kiwirotewute.pdfIn PDF document text
    • http://jipolavex.medianewsonline.com/13892856323.pdfIn PDF document text
    • https://cdn.sqhk.co/sesumaku/Dnbu8gg/cat_text_art_copy_and_paste_iphone.pdfIn PDF document text
    • http://remontnatali.ru/sueo_de_una_noche_de_verano_analisis_literario314xi.pdfIn PDF document text
    • https://dodawuwaxa.weebly.com/uploads/1/3/4/3/134305805/6835447.pdfIn PDF document text
    • https://cdn.sqhk.co/zerumowo/Tgi7jet/audio_joiner_not_working.pdfIn PDF document text
    • http://raifaisentgo.online/android_radio_app_head_unitsg9n4.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/7uhaghY/twisted_tea_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/tujuvemevo/gfGbDj2/sopanubolama.pdfIn PDF document text
    • http://nextauto02.ru/what_kind_of_oil_does_a_2011_lexus_rx_350_take9juz0.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/riiaiht/77273008150.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/Chdihjh/riot_blockchain_stock_price.pdfIn PDF document text
    • https://sixutaxujarupi.weebly.com/uploads/1/3/4/8/134882582/c959c23f0e6d8.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/hjJejf1/basketball_hoop_game_cool_math.pdfIn PDF document text
    • http://antileqphh.site/what_genre_is_game_of_thrones_booksqajro.pdfIn PDF document text
    • http://msertis.xyz/gagafotenopawobapewebav6lfsm.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/gcmiaAC/football_champions_league_2019_2020.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/zadinerimujepok.pdfIn PDF document text
    • https://vevusivo.weebly.com/uploads/1/3/0/8/130874001/5253209.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/patebavi.pdfIn PDF document text
    • https://cdn.sqhk.co/samumosoxivi/blzibji/ufc_expert_predictions_tonight.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gamovomubapo.rf.gd/70747050891.pdfIn PDF document text
    • http://zoligagomuwe.onlinewebshop.net/the_master_key_to_wealth_audiobook.pdfIn PDF document text
    • http://jatojitax.rf.gd/kojatikusasudini.pdfIn PDF document text
    • http://vopapatadape.epizy.com/pokuf.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_off0000ff1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1D 5232 bytes
SHA-256: 5335e80c45ce8663037c1433f486f7e8f524e4301392b8a3bb5161dc4e810f97
font_01_sfnt_off000110ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CE 11696 bytes
SHA-256: 8ce72944feb35cd19cf71695b8cbab5c0ef55452eccae744f602d67bc072df55