Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2889d8c395c82b…

MALICIOUS

PDF

43.5 KB Created: 2020-11-08 12:38:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c28227adb519401e5751aad988849c6e SHA-1: 7874c38bb95098e38cb0026b93da404c65fb7090 SHA-256: 2b2889d8c395c82b3633bc11733985f28ccb8ca94acd232f2a37ec61ff75d3d1
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://trafficel.ru/aws?keyword=g+switch+unblocked+2+player+games PDF link annotation
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/tegeniledezul.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/nababenusulu_divedanaxade_zakivupi_bozipafa.pdfIn PDF document text
    • https://xexiroxenokela.weebly.com/uploads/1/3/4/6/134613030/a1f042b2d80e.pdfIn PDF document text
    • https://vimarunuwib.weebly.com/uploads/1/3/4/3/134356039/1eb38960f617.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/68192cdf-efee-4766-bb05-53bdb154aeb2/tewojebulipowebogav.pdfIn PDF document text
    • https://diwelozizof.files.wordpress.com/2020/11/67553958254.pdfIn PDF document text
    • https://sipodugegir.files.wordpress.com/2020/11/1973213818.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/60520921347.pdfIn PDF document text
    • https://losorul.files.wordpress.com/2020/11/pokezobuluxovijeru.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/eliz_keto_scam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef3cb5c-d804-4190-add3-db9da1232caf/satojatenupuje.pdfIn PDF document text
    • https://nuziwonuw.files.wordpress.com/2020/11/72907951528.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/xefuvobotemonewoxivesuboj.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/informe_de_calicatas.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/muvisafivefarefujo.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_off000066e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E9 6048 bytes
SHA-256: d7dda076adb0bcca30f3a1de7c0a25f36aae5bae3c220e036a61a143dbe4211a
font_01_sfnt_off00007b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6C 11588 bytes
SHA-256: 774f4e1cb65298e430920366b3817cfce2fe45c225fd622fce641fa67dfdedc9