PDF malware analysis — malicious · acbe107cf19a26c5

MALICIOUS

PDF

38.0 KB Created: 2020-11-05 22:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11

MD5: 5a22972fa22be6266cb2abc57d1a765e SHA-1: 7fee7fc6992259a9561290fd430cd122b66154c0 SHA-256: acbe107cf19a26c580690c4d3bea67a000fe5f5e99e9b8dde33d907e5db0e2ef

76 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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=vector+problems+physics+worksheets+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4457881/normal_5fa33a9485a6c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412394/normal_5f974d006bdf9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366032/normal_5f90c0197d3da.pdfIn PDF document text
- https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/numuzeba.pdfIn PDF document text
- https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/vazigusabojov-vipesodud-burobodifulimen.pdfIn PDF document text
- https://xerutofen.weebly.com/uploads/1/3/4/5/134578778/8238259.pdfIn PDF document text
- https://sebonegipuwi.weebly.com/uploads/1/3/4/1/134108682/2935727.pdfIn PDF document text
- https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/lapikavefiwat_tewuzadobesu_renog_wigoba.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447437/normal_5f9efffbed5cb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382790/normal_5f9cb2e02c349.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/wonoti/pijuririfajuj.pdfIn PDF document text
- https://s3.amazonaws.com/purufiz/lumosajulabu.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00005453.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5453	5548 bytes
SHA-256: `0970c01d31a70db00032c84c6f10c53e2c691196b241b35ab2c31608e5ebc563`
`font_01_sfnt_off00006722.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6722	10504 bytes
SHA-256: `f6eaabbb4aaaff893ecaf6e4f611a257b52cfb66d266b5b3b00c8b07636d0318`

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