Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4c213edf2f1c8c…

MALICIOUS

PDF

80.9 KB Created: 2021-02-26 11:21:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 77b8835bd865f560aea56c443776c90a SHA-1: 1ba73eb24e3d220685ad3aca2f9421f4715765fe SHA-256: 6d4c213edf2f1c8c08b584cede644c2bcf9f1cf655ea653b3b21db0776019325
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=jonathan+livingston+seagull+summary+part+2 In PDF document text
    • https://cdn.sqhk.co/vilubofi/jcigfhc/servicenow_quick_messages_role.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382772/normal_6007db5eae470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_601dae070379d.pdfIn PDF document text
    • https://wewuketis.weebly.com/uploads/1/3/5/3/135327502/mebubet_rodumotugowixa_limojas.pdfIn PDF document text
    • http://medtechnika1.ru/beer_pong_golf_game_diy87ibf.pdfIn PDF document text
    • http://4escam-bot.online/how_would_you_describe_a_palm_treemga48.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/die5Cij/sweet_fever_hack_mod_apk.pdfIn PDF document text
    • http://rawenspant.online/xonudewerikokomafiserp82lg.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/76513541745.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/8jiNifY/malayalam_cartoon_video_free_download_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/igddUia/synonym_of_international_politics.pdfIn PDF document text
    • https://vipofobusaxipol.weebly.com/uploads/1/3/4/2/134234766/muvuto_bulidefikabepo_kekife.pdfIn PDF document text
    • http://timinome.getenjoyment.net/nadetujozuzudamatadomiw.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/betusuginotadudukifixev.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/zuponefi/instantaneous_dipole_induced_dipole_chemguide.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/aifmd_reporting_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/abhimaan_movie_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/constraintlayout_guideline_bottom.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_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 5516 bytes
SHA-256: 06b70200f28674eb26a0f31ff955a19e711a20369e6515022f0e56a531313668
font_01_sfnt_off00011116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 11048 bytes
SHA-256: 9d9e677235fce23e696916f519e83a5a2cf94ba5cb0fc8bb10d451ee004806e2