PDF malware analysis — malicious · b380fdb36b78f158

MALICIOUS

PDF

41.5 KB Created: 2020-10-26 02:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25

MD5: 7f0468a3a39f5cd028035a74320c8da5 SHA-1: 0894f13c3c50c0357a2562a54637ad11efcc4375 SHA-256: b380fdb36b78f158eaff358551da3368973431bab5fd73cccdb0bd110d8af567

194 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://cctraff.ru/aws?keyword=hambriento+nach+pdf+descargar In PDF document text
- https://birebojutadavom.weebly.com/uploads/1/3/4/3/134342015/4361941.pdfIn PDF document text
- https://kafigibedup.weebly.com/uploads/1/3/4/4/134479504/4262559.pdfIn PDF document text
- https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/pagefide-jeperowitemekug.pdfIn PDF document text
- https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/2632610.pdfIn PDF document text
- https://vafuzetok.weebly.com/uploads/1/3/2/7/132740798/a06e8e4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369166/normal_5f93db652583c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371025/normal_5f8c2ade4f2f3.pdfIn PDF document text
- https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/pubirejosepolezu.pdfIn PDF document text
- https://galebekamabe.weebly.com/uploads/1/3/4/3/134305591/ae3ff8a2f56bd.pdfIn PDF document text
- https://bufibefoxoxopij.weebly.com/uploads/1/3/4/4/134489975/343f04d46b18dd.pdfIn PDF document text
- https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/lozomu_zawonabo.pdfIn PDF document text
- https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.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://uploads.strikinglycdn.com/files/2f4369af-9174-495f-aac5-d79079116304/tres_metros_sobre_el_cielo_cast.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4b0aa7f0-1b5a-4f4a-b90d-1dce9bd3c857/jesevipatulogopazego.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d483fe7c-89d4-476e-8c8b-06199e59dbcb/9664342093.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6cb80d9d-5c72-4d96-8a36-7b96177b8715/american_red_cross_first_aid_manual.pdfIn PDF document text
- https://s3.amazonaws.com/sedimeraxufi/68125623859.pdfIn PDF document text
- https://s3.amazonaws.com/tulosa/vojal.pdfIn PDF document text
- https://s3.amazonaws.com/subud/dallas_arboretum_map.pdfIn PDF document text
- https://s3.amazonaws.com/fenatagazise/16357439136.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files2/83087329966.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://lectoresenextincionfree.blogspot.com/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.

Filename	Kind	Source	Size
`font_00_sfnt_off000051ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x51EC	5424 bytes
SHA-256: `8afbe0e45f66429beff230b320d18267a32260e9eb6702e265366a51c36c22d0`
`font_01_sfnt_off00006427.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6427	11260 bytes
SHA-256: `bb0180326473d204af398e92221b0e4ae792df177e588d335e67f5f2b7146bc4`
`font_02_sfnt_off00008914.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8914	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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