Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba599ed924977d0a…

MALICIOUS

PDF

74.3 KB Created: 2021-01-26 00:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7768cbb9c22b511f262f720e2c371184 SHA-1: e9ac742cf49976356596113c41841064a22adf8a SHA-256: ba599ed924977d0a9181617a2211d50f6c96f56787e8c032100cacec2c89eaf8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=cookie+girl+coloring+pages PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382189/normal_6002c58c04852.pdfIn PDF document text
    • https://fonuwinozizanam.weebly.com/uploads/1/3/1/4/131408397/97b08f0b14eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416318/normal_600325f4bd672.pdfIn PDF document text
    • https://nozubewow.weebly.com/uploads/1/3/1/1/131164313/363f6da.pdfIn PDF document text
    • https://wuwinotidewav.weebly.com/uploads/1/3/5/3/135349353/e75d5027b4d7c7.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/nawuvud/ruwariloj.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/gawoxewidasow.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/61511148422.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/sogaziruluxonifesot.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/fugekibomewifawopumebada.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/athlean_x_inferno_max_size.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/34944225235.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/51542043718.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/chasing_pavements_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/43077387741.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_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 5068 bytes
SHA-256: 736dcc1c6d63df427d546e55fbf4490a96494c0ea50be53ab3b79081f9f4b8fb
font_01_sfnt_off0000f875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF875 10668 bytes
SHA-256: 06f2864ec7943206873eba96f7544432bf98e3edfa33545437add1c16c39c0d7