Malicious PDF — malware analysis report

Static analysis result for SHA-256 799fad38c946ed68…

MALICIOUS

PDF

72.7 KB Created: 2021-02-14 23:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5f95920973e23b4c236e506991821c42 SHA-1: 9f57a8a0c124f81902b22e2bbbd7c68c6bc0ac7d SHA-256: 799fad38c946ed68a12028c276451eb9a2add71c1fa899225477a63bd04804ed
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wix?keyword=zynga+poker+mod+apk+latest+version PDF link annotation
    • https://jijaxiwiruba.weebly.com/uploads/1/3/5/3/135333012/wojotamigogira.pdfIn PDF document text
    • https://gurugurib.weebly.com/uploads/1/3/1/3/131384113/7081958.pdfIn PDF document text
    • http://zatorigixoluji.iblogger.org/regulatory_reporting_analyst_career_progression.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/f914e2cea6b43b1.pdfIn PDF document text
    • http://gunaborekigefu.22web.org/kebixibuvebel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wamigorudazuz.epizy.com/beamforming_antenna_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/thermometer_calibration_guide_kansas_state_university.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/t_sql_format_percent.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/best_online_car_games_for_android.pdfIn PDF document text
    • http://wivoruremuwun.rf.gd/bulk_foam_core_sheets.pdfIn PDF document text
    • http://sonogobujajeva.rf.gd/nawisukemifamebi.pdfIn PDF document text
    • http://gagisomix.rf.gd/5475354416.pdfIn PDF document text
    • http://xuvafinuvewabek.epizy.com/sheet_pile_cofferdam_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/apresentao_power_point_pronta.pdfIn PDF document text
    • http://paxuxuf.rf.gd/zabixemozowosew.pdfIn PDF document text
    • http://xulaxun.rf.gd/88935777711.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_off0000dca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 5460 bytes
SHA-256: 0a7ba8229158d48441b6e42aa05f46ac82c0c1c1d31fc892635b8d31d9bbed3e
font_01_sfnt_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 11408 bytes
SHA-256: cc2f3263dae0e9dd67e99545f5cdf8a69f17b5ccbdd2feb7c419d4b81a012978