Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2f27ecb99d25bc…

MALICIOUS

PDF

55.3 KB Created: 2020-11-05 21:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 1c8522183814086dc46a19019c004d8e SHA-1: 996dfaa19fd9013e5ef76678836d145b91d86acf SHA-256: 3e2f27ecb99d25bcc1f35b089ef8a4d990fb40b92f2b93f7fd1d38409b8c4a1d
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://trafffi.ru/aws?keyword=chemistry+chang+10th+edition+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f8bcd7ea87ff.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_5f8f508cc4f68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_5f96b7011112a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5f9743d0dc79e.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/zedudo/gamershood_terror_of_spiders.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/parabola_del_buen_samaritano_para_nios_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/85910858838.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/vinezab.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/nagezezusojifo.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/97240005082.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/20017345844.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/suwannee_high_school_address.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/ur79ec0303_carrier_remote_control_manual.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_off00009625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9625 5612 bytes
SHA-256: a86a9cb2f93cebb459d86979458d33bf62a633bcc8643d30be3c45123bffc83e
font_01_sfnt_off0000a927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA927 12428 bytes
SHA-256: d231cc8cae3ce62e2449629a21e2dbca36ad5c89612cc90cb3b06f74ee88917f