PDF malware analysis — malicious · 605e0f0b71b9e2e5

MALICIOUS

PDF

78.2 KB Created: 2021-03-08 20:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 6ddcdaba49ad7f9044f5b16e0b961d22 SHA-1: a4a5c97d6cf0abb79a7537067287c865039465b0 SHA-256: 605e0f0b71b9e2e5c971b09a389c2aba232765a4abaa92ae66c1c29f78f11a1b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to a book title. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links hosted on disposable domains, suggesting an attempt to obscure malicious activity. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://xezojetit.ru/strik?utm_term=me+before+you+series+book+4 PDF link annotation
- https://cdn-cms.f-static.net/uploads/4502906/normal_601980dcc4b39.pdfIn PDF document text
- https://cdn.sqhk.co/zunesunatiri/heifMjf/harvey_birdman_attorney_at_law_booty_noir.pdfIn PDF document text
- https://cdn.sqhk.co/faserekino/0yib4gJ/19952327178.pdfIn PDF document text
- https://cdn.sqhk.co/vusabutam/fjhnbgf/see_followers_timeline.pdfIn PDF document text
- http://rujisuki.mygamesonline.org/7873840393.pdfIn PDF document text
- https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/1855247.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4461481/normal_60010a902eee3.pdfIn PDF document text
- https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/bdb0742d4a54.pdfIn PDF document text
- https://cdn.sqhk.co/vifejoneses/geifTij/atualizar_android_tablet_samsung_n8000.pdfIn PDF document text
- https://sudesiresa.weebly.com/uploads/1/3/4/8/134881981/loninagur.pdfIn PDF document text
- http://nuloriwilorij.scienceontheweb.net/fujotumebegata.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4454681/normal_5fdd71d0eaf2f.pdfIn PDF document text
- http://memisada.mygamesonline.org/third_grade_spelling_workbook.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490524/normal_6022bdb9da9e6.pdfIn PDF document text
- http://xogubafirugufa.iblogger.org/classical_harmonic_oscillator.pdfIn PDF document text
- https://medadafamu.weebly.com/uploads/1/3/0/7/130775854/vedasimuxu.pdfIn PDF document text
- https://dazenesulamese.weebly.com/uploads/1/3/1/1/131164173/jalodewujugizulur.pdfIn PDF document text
- http://rufapemosisubev.22web.org/how_much_dog_license_cost.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/208e97c5-9f6e-414c-b473-9ea53bceffbf/degudin.pdfIn PDF document text
- http://zofududa.rf.gd/le_storytelling_en_marketing.pdfIn PDF document text
- http://zasuwunal.myartsonline.com/zitakuzati.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/05b789a3-0710-4c20-ba0c-79f0d0b0b6f0/momo_traders_ebook.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7f872832-4a8c-4a59-a807-82f8008a9a8d/apc_battery_backup_550_troubleshooting.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/119ca33c-d738-449e-a0e5-78ffea5cb947/what_is_meant_by_nationalism_in_india.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/271a127f-97ac-41d6-9b5d-659f143bf5dc/rejexelijuresab.pdfIn PDF document text
- http://gapifemesi.rf.gd/brother_xl_2600_sewing_machine.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_off0000f6f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6F7	4916 bytes
SHA-256: `cc4de5d767cc07b27a7be6efe2bec57a7105069fbd48edd7828499c726d1fa65`
`font_01_sfnt_off000107e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107E2	10436 bytes
SHA-256: `eded574c5ca044c8b81c44db6c3f46d71056df25c388bbdc407d7cb23dccb0cd`

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