Malicious PDF — malware analysis report

Static analysis result for SHA-256 40da46bac518e0dd…

MALICIOUS

PDF

46.7 KB Created: 2020-11-06 11:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 050b9951ce05bbfc7f111da59569d2b4 SHA-1: daa27ad45f95ffeca9748c1e3d834da96792109b SHA-256: 40da46bac518e0dd14620374b2628962d7078533e97fcd9755cbab82033998c3
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/strik?keyword=all+a+heist+with+markiplier+endings PDF link annotation
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/62359cebce6.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/lefiwuviginelu_vijojiz_vajoji.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/lebajikumuxolikidi.pdfIn PDF document text
    • https://zozelezike.weebly.com/uploads/1/3/4/4/134434207/1b6c731faa2c.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/4354840.pdfIn PDF document text
    • https://pajujetijawu.weebly.com/uploads/1/3/4/3/134334360/5888178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_5f95147cd6841.pdfIn PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/f2915a9df66.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/tabobujimo/mopovujasesurivolawowodaf.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/74873996608.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/robert_service_high_school_yearbook.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/antrenmanlarla_matematik_1_zml_cevaplar_indir.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_off000075d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D3 5516 bytes
SHA-256: cbe6ef42d74273269a013554718953269a2834eda6db40526c227dfc82861d16
font_01_sfnt_off0000887c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887C 11132 bytes
SHA-256: a28cf1b3c3287df381a75dd4d2cca30b47793583aad6756edadd3f58c0b5f650