PDF malware analysis — malicious · 7bfe1f1f07564c8c

MALICIOUS

PDF

84.1 KB Created: 2021-05-28 08:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: ca6277bbdba2e35c9706950cd63f92f3 SHA-1: 9b5481b5af4ff89c2aa8e65244e6b14f85774d5c SHA-256: 7bfe1f1f07564c8c9927fe5de9ec0a8f8a27d7490256c8be3a64be31e1d280b6

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are part of a link farm designed to improve SEO, with one prominent link pointing to a suspicious domain. The presence of a 'download button' lure and callback phishing elements further indicate malicious intent. ClamAV detection and ML classification confirm this is a malicious PDF, likely used for phishing or distributing malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 7

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 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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://jumiwimov.ru/strik?utm_term=evolution+ias+agriculture+notes+pdf+free+download PDF link annotation
- https://cdn-cms.f-static.net/uploads/4498997/normal_6030d97546e11.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4405903/normal_600379504fea2.pdfIn PDF document text
- https://vudeberas.weebly.com/uploads/1/3/3/9/133997553/sefex-nujifezerawajuz-somuleruboku-xupew.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450249/normal_6038bf04e1d50.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459641/normal_5fd326009fa4a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404488/normal_604986c74c593.pdfIn PDF document text
- https://dojovirofolabi.weebly.com/uploads/1/3/1/0/131069789/8716945.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489045/normal_60136f16456ad.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/90e8b92d-5355-466b-b753-9131a5ae2212/96686538156.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/96589031-7604-4aaa-b74c-5c5c7cd1e2f1/zabuneberajabejeriwejes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b1023431-b90c-41a8-8f01-410b2853b99a/how_are_newtons_laws_of_motion_used_in_everyday_life.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5f22b7f7-6294-455d-9d0d-fe69ad9797fd/jitituvip.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ea99f2fb-0586-417e-ba29-9fdc235a2eb5/91679534274.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c14895c2-f897-4969-931c-2f14ca5ce7df/988989976.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b388a49c-be9f-43d8-b3f3-b99227609656/is_greek_yogurt_keto_approved.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9354d45d-e717-4584-af97-98ba6e4bdc80/business_data_communications_and_networking_13th_edition.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/12f9eb4f-9d20-4d5c-b854-f628a1336a6b/5320385781.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ebe83f40-80b5-4570-9ef7-0d410a323dd4/proform_treadmill_repairs.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/78b204b5-57c9-4488-adf6-fc4f4c7b8979/3091663558.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e24d57c3-5525-4c1b-bf37-40509dd5a979/motorola_g6_android_10_update.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e09a4852-1518-480d-a35e-ce1d7ec74387/remokakalen.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0C7	5432 bytes
SHA-256: `8f464fb9f3976c397d32579842402467aff244970805a33e995285d38697c6bd`
`font_01_sfnt_off0001036e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1036E	11924 bytes
SHA-256: `2d801ab47b4fdc3ea1924b55c5208bd225b7d9057ab80e37c5a308559c49ebc9`
`font_02_sfnt_off00012b9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B9C	16164 bytes
SHA-256: `ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8`

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