Malicious PDF — malware analysis report

Static analysis result for SHA-256 7599e97dcdcb8ec2…

MALICIOUS

PDF

62.3 KB Created: 2021-02-21 18:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3d192ef4c2f9e06553a135f5fc5f9d48 SHA-1: 42628d5baff63e33bf4adfe440f114571fe2f53e SHA-256: 7599e97dcdcb8ec2a423f418942002c5ecd81dad9b9e054889371e2d0b4fbb97
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/aws?utm_term=howhit+150cc+engine+rebuild+kit In PDF document text
    • https://dolepaxutafajur.weebly.com/uploads/1/3/0/9/130969408/ef85636ea662.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/tgd9c2M/how_to_get_diamond_sword_minecraft_dungeons.pdfIn PDF document text
    • https://cdn.sqhk.co/noxavuris/ecYljcD/switch_keyboard_keys_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/9U9ggjb/89372020211.pdfIn PDF document text
    • http://prazdnikprosto.ru/artillery_duel_atari_2600edfvp.pdfIn PDF document text
    • http://ubzvp.com/american_war_movie_freegy18p.pdfIn PDF document text
    • http://meetsalon.xyz/pewamowojubatuxt11f.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/hajfhbR/tamil_hd_movies_free_download_website_list.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/ehcjdha/spin_orbit_interaction_in_shell_model.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/ieNCnhs/guide_for_dream_winner_soccer_2020_mod_apk.pdfIn PDF document text
    • http://pro-komp-master.website/dragons_wild_skies_unblockedmk7jz.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/fapaga/supapuf.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/flower_rose_pics.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/legevik.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/new_bollywood_full_movies_free_2018.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_off0000b5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DA 5388 bytes
SHA-256: 696319c08401e2bdef8fae3a2b7351ba1689276818d5a48f1f5b776a453485c1
font_01_sfnt_off0000c847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC847 10500 bytes
SHA-256: 06275749e35d19cf82cd69f382dfa7a6480cddd59f3da0a4b241c65626a54b0c

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