Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b4d6ebaf0f55b9…

MALICIOUS

PDF

70.4 KB Created: 2021-01-19 21:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 92e4c4f5bc68564a3dfa48a753f4ceba SHA-1: ed8c16cf41f6bfd7b4ff8a3008ff1f9b14955204 SHA-256: a3b4d6ebaf0f55b96d0e059929e5fe0adfb56727d23c646a3f29934a2b5d9a13
196 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
  • 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://jacksth.ru/wb?keyword=rugby%20world%20cup%202020%20winner PDF link annotation
    • https://gajaxaja.weebly.com/uploads/1/3/2/7/132712369/815d334605e2.pdfIn PDF document text
    • https://cdn.sqhk.co/bojexisebiwi/gezjhhc/todisufu.pdfIn PDF document text
    • https://fetubuka.weebly.com/uploads/1/3/1/3/131379928/zofijiw_ritijo_sorigiwog.pdfIn PDF document text
    • https://cdn.sqhk.co/dovutiwabule/fjdgdft/craft_palace_pro_para_pc.pdfIn PDF document text
    • https://tuzunogosur.weebly.com/uploads/1/3/0/8/130815213/ffb331257.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/fjiagfR/prank_caller_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/lojumisebu/hdjfxgg/halloween_party_day_2019_amsterdam.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/jbyrjdU/75933555595.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxovugefulo/gejaSpk/gopro_parkour_fails.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/gi82mgg/how_to_make_origami_christmas_tree_cards.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450160/normal_5fedbf71072f7.pdfIn PDF document text
    • https://cdn.sqhk.co/novozefox/hghbeqh/funny_hippity_hoppity_memes.pdfIn PDF document text
    • https://cdn.sqhk.co/wafexumu/0Eih6ic/drag_car_mobile_wallpaper.pdfIn PDF document text
    • https://site-1177860.mozfiles.com/files/1177860/vedic_astrology_compatibility_report.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/sukobogixe/bcbs_fl_prior_authorization_form.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_off0000d83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83D 5468 bytes
SHA-256: faeaef3063a9ed27bed3fb864ec2b86e4c063fd6717c04e0e31ae9118e5a9833
font_01_sfnt_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 9988 bytes
SHA-256: 0053ba965666cc46746171a69bb309621819a9eb6cf7b1ac45f75a86aa2d5b7c