Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff77a7434043013…

MALICIOUS

PDF

74.7 KB Created: 2021-02-23 10:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 18ffca9d01d15877e1dc89838e9d5dae SHA-1: bd303578b8d5f3c8897231616c22514bd4a9ae1d SHA-256: cff77a743404301383559c906423dbbe4b42e03e652904e48a52290b9a2ef217
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/wix?keyword=productivity+and+the+carbon+cycle+worksheet+quizlet In PDF document text
    • https://cdn.sqhk.co/busumodofu/5UichbS/starlink_battle_for_atlas_ps4_starter_pack.pdfIn PDF document text
    • http://premiumpornclips.com/92953576178zcns8.pdfIn PDF document text
    • http://espaceabonnes.com/how_to_find_years_in_compound_interestzxf7r.pdfIn PDF document text
    • http://epipog.com/xilazafaxirotalopiguxiwapr42oc.pdfIn PDF document text
    • https://cdn.sqhk.co/dukapudubi/ijd3mih/16818365882.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/Ehhhagi/sujuwojolujatudulejozina.pdfIn PDF document text
    • http://dezlice.ru/zokobarukan0nvyl.pdfIn PDF document text
    • http://coupons2020.info/185681358936dmaz.pdfIn PDF document text
    • https://lefojokux.weebly.com/uploads/1/3/5/3/135399193/1209683.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/c1TUL6l/empire_total_war_politics_guide_france.pdfIn PDF document text
    • http://onlinesos.tech/centre_de_formation_a_distance_bruxelles_aviserri4.pdfIn PDF document text
    • http://lifeshop.pro/61351296709xszh0.pdfIn PDF document text
    • https://lazofakivew.weebly.com/uploads/1/3/1/4/131406449/sadiv-saguzubemib-fixonene-zubudajoxo.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/jidagafinuxesu/charlie_puth_attention_lash_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/amundi_asset_management_sa_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/46022334050.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/desetegovufovokidunonu.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/mexican_peso_to_cad_cheat_sheet.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_off0000e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C3 5664 bytes
SHA-256: 2ed7778ff9f259366df1a5c5331baf3518f71be0d7b5cb830a26a7c964e6a05d
font_01_sfnt_off0000f91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91E 10704 bytes
SHA-256: 73e24f9c3f023ea233f33cf90f857b3cc3e3e2d159f0bb641d8726c84ac17d0f