PDF malware analysis — malicious · 1cd2d3ff68391dc1

MALICIOUS

PDF

40.5 KB Created: 2020-11-07 11:03:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23

MD5: e0c5bdd70580f5ec0a0512d689bd2b9f SHA-1: 93e5ea0f63fdf4de1c9fcf8befe390fcc29dcfcc SHA-256: 1cd2d3ff68391dc171c3d2bbaa6989494127ea24298312490afb80f616c22b0a

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://traffset.ru/aws?keyword=medical+fellowship+cover+letter PDF link annotation
- https://cdn-cms.f-static.net/uploads/4369507/normal_5f8e612c2ace5.pdfIn PDF document text
- https://jiketajaw.weebly.com/uploads/1/3/4/4/134464131/relobejiwukomikus.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409609/normal_5f99021c9aa20.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387421/normal_5f9f7202218e8.pdfIn PDF document text
- https://rebeluzibefu.weebly.com/uploads/1/3/4/6/134619862/39bbd8.pdfIn PDF document text
- https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/25d8cdd6c72a1.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/bidivo/suradesasaxare.pdfIn PDF document text
- https://s3.amazonaws.com/tujeviwakirawu/what_the_koran_really_says.pdfIn PDF document text
- https://s3.amazonaws.com/zedudo/hacked_asphalt_8_airborne_apk.pdfIn PDF document text
- https://s3.amazonaws.com/jadudusujuje/40483535961.pdfIn PDF document text
- https://s3.amazonaws.com/zuxime/accidentally_in_love_book.pdfIn PDF document text
- https://s3.amazonaws.com/sugaguxagu/thread_dimension_chart.pdfIn PDF document text
- https://s3.amazonaws.com/tadovu/chinese_alphabet_letters.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_off00005f71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F71	5400 bytes
SHA-256: `7815bde525f98da4b12357c10661617698c55e1d433537bca8abb547f9d7b8c8`
`font_01_sfnt_off000071ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71EF	10488 bytes
SHA-256: `5a1dbb7ab7490c507da6eb9865a8b7b6c0d8ad7bc3493277e5cddff3b6e90e1e`

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