Malicious PDF — malware analysis report

Static analysis result for SHA-256 3acc62c71e0ff5ef…

MALICIOUS

PDF

38.3 KB Created: 2020-11-06 08:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 010365493326cf139b9656865ad7695e SHA-1: ff9b2e53ea013e8ec2f082a35b363657deea0a74 SHA-256: 3acc62c71e0ff5ef69bf20b8e4549f3f8b4d6221ddf53e4094fbdf05f573858c
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/123?keyword=write+a+letter+win+a+house+canada PDF link annotation
    • https://rumorima.weebly.com/uploads/1/3/4/3/134307849/sagorepewuro.pdfIn PDF document text
    • https://josilagowuf.weebly.com/uploads/1/3/4/0/134018629/1e4b4bc1cf.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/95847.pdfIn PDF document text
    • https://waratonis.weebly.com/uploads/1/3/4/2/134235653/gakixi_ralovesiput_daxet_vakilebup.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/fasanag/76121150866.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/fowopejofapifesifotuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4832b3c-30d2-4647-b04d-0b051d54326c/lurupopumigox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7256acff-cd3d-478a-938f-fe1e41809adc/varozinapisijofarubugajuk.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/mens_softball_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b94d2c-ef55-4c62-b322-bd7b3c7cc598/71471305181.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/23892909757.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_off00005b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B04 5132 bytes
SHA-256: 0f00b5e595debbdba6d612f41e6eae52ab2beaeab485748f25d631cad050eb0a
font_01_sfnt_off00006c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C85 9404 bytes
SHA-256: b4bd9725fd9c39409b4d21f05014bb7b4a326fd4c27b75068cb6198ab8b271dc