PDF malware analysis — malicious · 90809b45d86516af

MALICIOUS

PDF

82.3 KB Created: 2021-03-20 21:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: 1f834c37c5db9970a1aca78913c32a84 SHA-1: 16cf0c8a4185acf3d88da4a5db6c09a634f808e0 SHA-256: 90809b45d86516af19644ec10f37de07ff63536b3970a08d314268b24139455f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a large number of external links, with one pointing to 'zajinet.ru'. ClamAV also detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to lure users or manipulate search engine results, potentially leading to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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://zajinet.ru/aws?utm_term=ex-cell+vr2500+pressure+washer+engine+owners+manual PDF link annotation
- https://fixoxotogixas.weebly.com/uploads/1/3/4/3/134374926/sunode.pdfIn PDF document text
- https://jaroxifapo.weebly.com/uploads/1/3/1/6/131636664/d9e13cca3ef21.pdfIn PDF document text
- https://lededafekipolo.weebly.com/uploads/1/3/4/4/134404801/xubalilokatiwikubaw.pdfIn PDF document text
- https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/rebepaluwa_moluwunus.pdfIn PDF document text
- https://lotigasi.weebly.com/uploads/1/3/4/7/134705720/727a773f17.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/dalava/sda_hymnal_music_edition.pdfIn PDF document text
- https://4900ecec-7ac1-411c-be2c-b077674085c8.filesusr.com/ugd/493135_3b2b6398e001496db35fef1fbab65a86.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jajuzasalikirut/forming_plural_nouns_worksheet_for_grade_1.pdfIn PDF document text
- https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_91cf62ba944141b2b9b0fa0a7abe3503.pdf?index=trueIn PDF document text
- https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_02b19191b4f04decb2d6b694626e1cc0.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/5ea8b9a2-581d-4ed6-a5ec-29a087eb30e4/pusafeviposegore.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0549c485-b2f8-4da3-a21c-9f0abeb61aaf/why_are_your_personal_narratives_important.pdfIn PDF document text
- https://s3.amazonaws.com/fukezavazuj/biwirofifomolol.pdfIn PDF document text
- https://fb1cd387-549b-40f1-a5a4-67fd65d29bb3.filesusr.com/ugd/4200b4_ae24e6ab6c2d4dfca1d972ca939808d3.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fowikorejodi/search_engine_optimization_2019.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/52126da0-1bd9-4cf8-a44c-a96dd360a18c/domizuludutunavasibuz.pdfIn PDF document text
- https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_8ab7fa75d75f460f8ae1134eae15fe70.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tabobujimo/genenubijagewulukak.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b0b2678d-bb47-4da2-824d-4171f22a0daa/what_is_a_lincoln_douglas_debate_format.pdfIn PDF document text
- https://s3.amazonaws.com/jozaponi/farizezudidejidemoben.pdfIn PDF document text
- https://37cc4ef3-276f-49d0-84f3-8bc08bbde6a9.filesusr.com/ugd/e4a5d4_c67214bc70274cc6953e5b0edb8e82dd.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/kuxuxemu/82764105038.pdfIn PDF document text
- https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_cafc6f7e8baf4f9aa99c71d9d4aa6827.pdf?index=trueIn PDF document text
- https://a16eeaf1-ab09-4fb7-bdbc-3ebfa24c279d.filesusr.com/ugd/03042f_7de599fe6bd44e5b9427b9ed20b1d587.pdf?index=trueIn 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_off000101db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101DB	5956 bytes
SHA-256: `93cee4e13711ee0df551536c5c2ab58a9335d589f1f0d4982adbe71aa8bc297b`
`font_01_sfnt_off0001161b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1161B	11124 bytes
SHA-256: `7ac5d60b7405aca1f5a9341ccac5c50c551c33a68af86bf38fd086f50f84ef93`

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