Malicious PDF — malware analysis report

Static analysis result for SHA-256 d886e91741a0ad07…

MALICIOUS

PDF

40.5 KB Created: 2020-11-07 00:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: c8f77028ef390201a6a007daf8d41221 SHA-1: ad934c4d8b0946a0cd2748228a8721b391d561e4 SHA-256: d886e91741a0ad0730ff2752bb7bc2104bb624898d8611ffbd51dcebad6d1ecc
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=minecraft+pocket+edition+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410006/normal_5f9477039a56b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f88664c02db1.pdfIn PDF document text
    • https://jezosodakadofa.weebly.com/uploads/1/3/4/3/134376186/wuzabibuziwusiv.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/2478157.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/2332101.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/ce02014a20d.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/lanubili/90086224045.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/eddie_bauer_guide_pro_alpine_pants_review.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/fuvibowaponixilobale.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/belojuf.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/89399892893.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/85838186351.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/contingency_approach_to_management_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/ankle_sprain_rehab_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/23922892584.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_off00005f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F98 5008 bytes
SHA-256: b03098cdb7408828bf1ceb631cb6693aae06b89a0231242ba1fd96bb115778a5
font_01_sfnt_off000070c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C3 10764 bytes
SHA-256: 44021301b9d08bddfedfbdf10e13c56f1061053159641098189d4ec9feaad257