Malicious PDF — malware analysis report

Static analysis result for SHA-256 304a688adff01e23…

MALICIOUS

PDF

71.5 KB Created: 2021-01-27 08:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 28eddcaa324b1f0e66397eb6cf582521 SHA-1: 52aed17bf27ef97b157541c99c9cc5cbd4a143d6 SHA-256: 304a688adff01e23331fddac33b2bc44eed4c9d85304e83d13c6bd549723bca6
196 Risk Score

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
  • 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.
  • 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://seumenha.ru/aws?utm_term=profile.+dat+for+dls+19+unlimited+coins PDF link annotation
    • https://cdn.sqhk.co/bizujutenifo/hbhgif8/police_car_driving_offroad_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabumumiw/lcYhbhi/tokyo_mazesoba_recipe.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/lugosulurefurarago.pdfIn PDF document text
    • https://cdn.sqhk.co/nofevemumidu/jdOgdgd/dinapomifepatutopopo.pdfIn PDF document text
    • https://cdn.sqhk.co/dupabeket/hhihjc0/adversary_crossword_clue_dan_word.pdfIn PDF document text
    • https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/1364343.pdfIn PDF document text
    • https://nulebuset.weebly.com/uploads/1/3/1/4/131411431/0e1fb727a.pdfIn PDF document text
    • https://cdn.sqhk.co/pejasibupap/icjaQhb/30731230747.pdfIn PDF document text
    • https://vemosigexirapi.weebly.com/uploads/1/3/4/3/134387812/344dddd0b2a64.pdfIn PDF document text
    • https://cdn.sqhk.co/nemizuxe/8Tjfpij/tanapopesebefo.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/hfhcjbR/xekimelidir.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/yig3zid/90s_hit_english_songs_list.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/wovugi/fridge_freezer_temperature_log_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/civilization_iv_beyond_the_sword_strategy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/administrative_officer_job_description.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_off0000d996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD996 5408 bytes
SHA-256: ae31e0b2f44eb9bb760fbd15794416bfe76f7a828d5c0c88818a106bb8d4c8af
font_01_sfnt_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 10888 bytes
SHA-256: 07e2b2c230555ad30cc1d7ee8fce88f2ebdee8a26ef5b5bad63c1af2d4a3da37