Malicious PDF — malware analysis report

Static analysis result for SHA-256 991854f6c0a63051…

MALICIOUS

PDF

73.0 KB Created: 2021-03-16 07:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 17e04963f552c04dca11322be9c48506 SHA-1: 05568294e03eaa7859d1563ac75b768279feeaa7 SHA-256: 991854f6c0a63051a62880e88f134a27a945a1e17d2097b31788b7c4cbbdaa24
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to suspicious domains and are likely part of a link farm designed to attract traffic. The heuristic 'PDF_SEO_LINK_FARM' and the presence of many unknown reputation URLs strongly suggest a malicious intent to redirect users. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates a common tactic to bypass security filters by suggesting a password for an encrypted archive, further supporting a phishing or malware distribution scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://midufefew.ru/award?keyword=black+sabbath+heaven+and+hell+tab+pdf PDF link annotation
    • http://intereriia.com/boardgamegeek_terraforming_marsa7xwb.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/ghizmhb/sportsmax_live_stream_cpl.pdfIn PDF document text
    • http://letxxnx.org/stanley_garage_door_opener_remotebhkxf.pdfIn PDF document text
    • http://avtoshtorki.shop/67398900185xlu9f.pdfIn PDF document text
    • http://reassurez-moi-fr.info/gibileridisuwhrjit.pdfIn PDF document text
    • http://atomlinux.com/60987836138je9wh.pdfIn PDF document text
    • http://meetplafond.xyz/pdf_bestand_kleiner_maken_adobe98hzs.pdfIn PDF document text
    • https://cdn.sqhk.co/jawosuzexe/jhjgeXA/pivinukobowug.pdfIn PDF document text
    • https://lasuzolus.weebly.com/uploads/1/3/5/3/135315371/9718087.pdfIn PDF document text
    • http://themarkuzmusic.com/brandy_melville_stores_in_arizonahvd91.pdfIn PDF document text
    • http://loveantravel.xyz/2244394460747tn5.pdfIn PDF document text
    • https://lirisuvobuku.weebly.com/uploads/1/3/5/3/135399047/fimagafeludufaraxilu.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/hjcKpE5/outdoor_go_kart_racing_in_las_vegas.pdfIn PDF document text
    • https://vudulami.weebly.com/uploads/1/3/5/9/135964857/7141646.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/dutuzanob/7592877542.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/is_cfa_prestigious.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/minogorupafiginotuzudof.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/honeywell_1300g-2usb_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/xelalogagewomimosutib.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/new_themes_for_powerpoint_2013_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/guided_imagery_audio_for_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/offline_car_games_apk_free.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_off0000e005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE005 5460 bytes
SHA-256: da69cf2e1a5ef135238c684d639ce14cc6f14cab4b0857e93cdd25d4fb1d8255
font_01_sfnt_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 10464 bytes
SHA-256: 7c58632c0155e65d348e491dd64cd1cc1a46b08c65cb4d4cf8e0f522e319333a

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