Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1e76ff56f2ccb3…

MALICIOUS

PDF

48.0 KB Created: 2020-11-07 19:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: bb2e72e1d7e250f13a6bac9dac8f2035 SHA-1: 24e44fc38f66ff224598248a6d11ac440b23fcac SHA-256: 0f1e76ff56f2ccb380bff509683042440424aa3dbb54d4ff4d947b9e9ec58bd9
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/123?keyword=dra2+reading+levels+chart PDF link annotation
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/zixoridinugakub.pdfIn PDF document text
    • https://vokewubepil.weebly.com/uploads/1/3/4/4/134443825/7882613.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5f91010830413.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/debulevepujale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5f96dfce64438.pdfIn PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/6986617.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/9446493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bulozor/rukolokerubokuliwiwigixib.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/92277923630.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/gopiv.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/jegogu.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/9945251448.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/ucb_academic_calendar_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000713a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713A 5068 bytes
SHA-256: 8f4103eedde121656260adb3469c3fd9f186aa73394863ef9d467f50360d7480
font_01_sfnt_off00008274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8274 10076 bytes
SHA-256: d487d6935eb96d70c991152e30b20467bbf1d9f4e7299e79835354082ffaeabf
font_02_sfnt_off0000a4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4EB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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