Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd118b4dc7ed912…

MALICIOUS

PDF

80.2 KB Created: 2021-02-28 10:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8ba74c8cbfa77b824404f4a440852674 SHA-1: 617dadbf56bb9b28aacd11460ec7daaa11d3c7cb SHA-256: 7cd118b4dc7ed9123e0aec1a778d6f3c6f67c9ab3e1f9cf97ab14cf4135df222
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm and uses suspicious links to lure users to malicious domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attack aiming to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://xezojetit.ru/award?keyword=does+canon+rebel+t3i+have+bluetooth PDF link annotation
    • http://vubitim.sportsontheweb.net/10387878880.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/zuvisa.pdfIn PDF document text
    • http://hiziryigit.online/nfl_tv_schedule_monday_night_football4lf2b.pdfIn PDF document text
    • http://13millions-warzone.store/how_to_use_fractions_on_ti-30x_iis1q6x7.pdfIn PDF document text
    • http://blognews.top/the_ancient_giants_who_ruled_america_by_richard_j._dewhurst5ngij.pdfIn PDF document text
    • http://com-signto2.xyz/video_games_2020_xboxuhz6x.pdfIn PDF document text
    • https://xevefoworux.weebly.com/uploads/1/3/1/3/131380592/xelafitamajiz-sufukod-povesumevasa-pelikajipoj.pdfIn PDF document text
    • http://delinapod.mypressonline.com/how_many_books_are_in_the_wings_of_fire_series_in_order.pdfIn PDF document text
    • https://lefaxujil.weebly.com/uploads/1/3/0/7/130739779/6808392.pdfIn PDF document text
    • https://rufuroborotefin.weebly.com/uploads/1/3/1/8/131856068/lizoraduwabenopozu.pdfIn PDF document text
    • http://loginwithfb.site/fijuxirejisi142hd.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/how_a_bill_becomes_a_law_philippines.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/vampire_diaries_season_1_episode_22_song_list.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/toxisodujopisikemofev.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/vuxasoxozisexabavepokx93i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lolofekigosot.epizy.com/firebase_analytics_custom_events_android.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/40305596346.pdfIn PDF document text
    • http://gugakalorezo.epizy.com/49636652556.pdfIn PDF document text
    • http://tatenawagoxibe.epizy.com/how_much_water_to_add_to_fresh_squeezed_orange_juice.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/tazaxunatijijinifelegu.pdfIn PDF document text
    • http://toloruware.rf.gd/baneguide_brnderslev_golfklub.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_off0000ef03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF03 5248 bytes
SHA-256: 787bf7162c29b445693cd1ee862857d1c5cc5efdc5fac6e64c997fd6a95f8827
font_01_sfnt_off000100e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E4 15804 bytes
SHA-256: c6996c0a3d6f4893969c5dd1b85228b2cffc15fe2486016d779f1bfcb1c80c70

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