Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e3ad841dd84af1…

MALICIOUS

PDF

69.3 KB Created: 2021-03-10 11:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: af9e1585147609793d07a0fd9d5e9ac3 SHA-1: ad460f4f7e52456a3ed0ebb93479766493364a57 SHA-256: 45e3ad841dd84af194bdd4c384bf359d189520cb4d7e483b02d0223141d4ba58
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/award?keyword=calculus+early+transcendentals+6th+edition+even+solutions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385028/normal_601f14e430aed.pdfIn PDF document text
    • https://roguzemu.weebly.com/uploads/1/3/6/0/136018034/4718240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5fda189bc1d13.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/hejhrOt/rexuwenomejabofanujuxado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_603c247ad46c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483623/normal_6047b7872183e.pdfIn PDF document text
    • https://juwabizaf.weebly.com/uploads/1/3/0/9/130969053/1975185.pdfIn PDF document text
    • https://cdn.sqhk.co/reromiwo/hdjif0J/walilixutewefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_603f96e4a68fa.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/dBhjewL/2275185477.pdfIn PDF document text
    • https://ginufadep.weebly.com/uploads/1/3/4/6/134668932/982237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403129/normal_5fd76c61b5f28.pdfIn PDF document text
    • https://cdn.sqhk.co/litopozuf/hhjhMhg/how_to_make_2_color_swirl_frosting.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/hfE0Jge/super_mario_bros_3_world_7_second_castle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491157/normal_5fd8ff902575e.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/baritexovopa/calligraphy_practice_sheets_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/answer_sheet_toefl_primary.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/94177571244.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/how_to_draw_a_mans_head_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/babel_transform_es6_to_es5.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/8356058742.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/ninulavojumejamaruvezil.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/popugojetunivaribobo.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_off0000cf45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF45 5464 bytes
SHA-256: eae5f8866787f87c3bd17407c73b677bba8722587bf1d7019512521c960927f0
font_01_sfnt_off0000e1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DB 10380 bytes
SHA-256: ba80039edeb0f71762e9685480be465113339db6a4f1d9d8e8af15c538721a2b