Malicious PDF — malware analysis report

Static analysis result for SHA-256 8446864b170d0464…

MALICIOUS

PDF

48.8 KB Created: 2020-11-07 20:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 99639d43c0055006a68604e2b1e09064 SHA-1: 834380babc11c80b2848712bd7a650fa13768b10 SHA-256: 8446864b170d0464bc8c4e02ae04f86adf06a58b53519e9b0ca4722a58d2b01c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/aws?keyword=kindergarten+sight+words+activities+pdf PDF link annotation
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/3235432.pdfIn PDF document text
    • https://xoxefalumigak.weebly.com/uploads/1/3/4/5/134527234/71d8e5.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://pawusimogi.weebly.com/uploads/1/3/4/4/134444718/5790091.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/didipiwujiwudap.pdfIn PDF document text
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/2626781.pdfIn PDF document text
    • https://debaduvevuw.weebly.com/uploads/1/3/4/3/134383420/womuduragovogo_wulol.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/henghuili-files2/vejilunovaludenis.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/jijawumuv.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/fabivo.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/age_of_war_2_hacked_games.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/phonics_worksheets_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/watch_padmavati_full_movie_online_free_dailymotion.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/monster_hunter_generations_sword_and_shield_guide.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6714 5504 bytes
SHA-256: f50f5752e03d31033ab8e1ad1da7e8269293ae694310df99ab33b5edfd1b234a
font_01_sfnt_off000079e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E4 4964 bytes
SHA-256: d6d31dcb75fdcb300f143ac5444ec408dac87cdb08cfd75e42359976d5713a18
font_02_sfnt_off00008bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDD 10108 bytes
SHA-256: 57e700803d21c87c7dc6262b55d9d325aa4cec8126d46305162531ebd8e23fa0
font_03_sfnt_off0000ae6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6D 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960

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