PDF malware analysis — malicious · b7640e8a11f02ca4

MALICIOUS

PDF

86.3 KB Created: 2021-03-19 18:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: b7742f4c0c3d100a4c3b99ec5541dcf2 SHA-1: 5ac7e639cb71a0c0cb61b666dc8b893a48e33bc2 SHA-256: b7640e8a11f02ca418860731a897b28f3c1876681cf63a6fa284c91523b08358

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains an embedded URI that redirects to a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of an AcroForm button with an action trigger further supports the possibility of user interaction leading to malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9967

Heuristics 6

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.
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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/wix?keyword=manual+for+toshiba+fire+tv PDF link annotation
- https://cdn-cms.f-static.net/uploads/4457582/normal_6034f2d38c054.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4380229/normal_5fcc9ab597603.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4472501/normal_604d1cb582b8e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375351/normal_601f8eb875728.pdfIn PDF document text
- http://nncucuucuc.space/fogufixulwgat.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446645/normal_5fccb8d626fc5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417656/normal_603e647bab40b.pdfIn PDF document text
- http://vknart.xyz/fipunimudutakusugqgna.pdfIn PDF document text
- http://securespot.ru/what_does_runes_name_mean_in_skyrimcm0pw.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4466172/normal_5fdf3063c3b62.pdfIn PDF document text
- http://fbcopyright-center.com/vapedswyxo.pdfIn PDF document text
- http://lienforkid.com/60567676105nxow0.pdfIn PDF document text
- http://cleanup-sale.site/carta_poder_para_recoger_paquete_dhl8ueo6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458618/normal_5fd22e079a528.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405687/normal_5fe823c1a9662.pdfIn PDF document text
- http://wiinorama.website/sevimolariprltp5.pdfIn PDF document text
- http://bio-ita.fun/brandy_melville_grey_sweatpants_dupeuvfwk.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4488842/normal_6008a5f621385.pdfIn PDF document text
- http://avtoshtorki.shop/rii_gaming_keyboard_and_mouse_sett1ek8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://laganomezavarof.epizy.com/77968966738.pdfIn PDF document text
- https://s3.amazonaws.com/zidosozawok/96691653753.pdfIn PDF document text
- http://dusitabupev.rf.gd/veruxos.pdfIn PDF document text
- https://s3.amazonaws.com/dazovosugev/graco_wifi_video_baby_monitor_review.pdfIn PDF document text
- https://s3.amazonaws.com/figugipopar/rexufinimasep.pdfIn PDF document text
- https://s3.amazonaws.com/ruzaganog/curriculum_map_template_higher_education.pdfIn PDF document text
- https://s3.amazonaws.com/vebogotexaf/18915881005.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_off000113e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113E3	5060 bytes
SHA-256: `59659043c9d6236a8e0058489b3f6a0fbe2a76c31ac0f9e615348f4bb6ca28fa`
`font_01_sfnt_off00012528.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12528	11284 bytes
SHA-256: `67d4b0a979de1965a64ca86269388f5b08d7068827ca077b6c2ada67362a073d`

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