PDF malware analysis — malicious · 8998bea14e8d6f47

MALICIOUS

PDF

46.9 KB Created: 2020-11-08 02:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23

MD5: 6929bf2ebc7b84f70727efb526d9c0ca SHA-1: d570ca43c3fd50918667950d0e06283d076407fe SHA-256: 8998bea14e8d6f47a0a1352609abf4885166ea4b091c19e6913775b0da6ab37c

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://trafffe.ru/aws?keyword=motor+labor+guide PDF link annotation
- https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/bodepoxuzuzuwoliw.pdfIn PDF document text
- https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/xatepigijidem.pdfIn PDF document text
- https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/roseraxigowe_zimowa.pdfIn PDF document text
- https://zazusixalug.weebly.com/uploads/1/3/4/4/134491239/dagemupibebozutezu.pdfIn PDF document text
- https://zupipozove.weebly.com/uploads/1/3/4/5/134589893/lifal-timagudiz-pepopizoruzu-laxasel.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/tinajabizoreguf/45711622999.pdfIn PDF document text
- https://s3.amazonaws.com/kavitokolezub/cooling_tower_principle.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/64f5730a-3b85-4595-9311-ff00dd7f4204/zokutigasabovifaxugivumu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ad35706b-555c-4349-8dd9-c7b73d74a5ed/96827586514.pdfIn PDF document text
- https://nikuberutozi.files.wordpress.com/2020/11/tapozuvofezinugifalese.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5a7efebd-8fc2-4960-8368-8dd3f81425e4/41764183185.pdfIn PDF document text
- https://sirilab.files.wordpress.com/2020/11/70870375218.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a324aaec-42fe-4940-afb3-177073c815a3/steampunk_pocket_watch.pdfIn PDF document text
- https://s3.amazonaws.com/wusigipufuvowix/weluberaxetu.pdfIn PDF document text
- https://s3.amazonaws.com/felasorarabipis/manef.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fa7b6f09-d5d7-4b8d-a093-8ad5f361341a/nesadaxuzakolarajabaz.pdfIn PDF document text
- https://s3.amazonaws.com/divelikubapiwaj/nursing_aptitude_test_philippines.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_off000079e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79E8	4960 bytes
SHA-256: `2f09a7a24195aae8e69255f3edc935bf8b286f08654389df0098bbaa330a4dce`
`font_01_sfnt_off00008adc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ADC	10492 bytes
SHA-256: `c056a7c2d2d5718a7cb12c4abdfa70e0972c4a62eb6fde99d882b56718f10154`

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