PDF malware analysis — malicious · 2c8a790793b48eb5

MALICIOUS

PDF

84.1 KB Created: 2021-03-17 05:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: b533cd2f222d98be9e201a5d5e230184 SHA-1: 200f9992aa651dcb99b1e63666019e3f97a5f8e1 SHA-256: 2c8a790793b48eb514f64492e6c12ddcfe1a6828fa7e1c9a8720683b151de1ce

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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.
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://gimoguvi.ru/award?keyword=pre+b.+ed+syllabus+2020+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4393209/normal_5ff46caa661d7.pdfIn PDF document text
- http://lixodamevurobar.mygamesonline.org/xerox_transfer_belt_cleaner_needs_to_be_replaced.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4455639/normal_5fc5da51f06bd.pdfIn PDF document text
- http://korogesubelokut.mypressonline.com/63605872717.pdfIn PDF document text
- http://desajegurake.scienceontheweb.net/arifureta_shokugyou_de_sekai_saikyou_light_novel_volume_5_illustrations.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464070/normal_601b13bc8c150.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4460678/normal_5ff3e6117fd6f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405179/normal_601fc70215f38.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://s3.amazonaws.com/sumesawoxajew/deputy_minister_correctional_services_ontario.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d8bb6ec3-feb2-4bba-9d9c-0472a50bf929/what_are_the_causes_of_coronavirus_pandemic.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5373346a-c8ef-4095-930b-11ee69e412f2/igloo_ice_machine_troubleshooting.pdfIn PDF document text
- https://s3.amazonaws.com/midipes/96685645471.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d7ec2a7e-aed3-4323-868c-f471db1a8419/g_shock_triple_sensor_multi_band_6_tough_solar.pdfIn PDF document text
- http://xelidamos.epizy.com/47660265094.pdfIn PDF document text
- https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_a78551fcf1cc480b9f3087ecd3269999.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jolituzoji/losofonipulusokopif.pdfIn PDF document text
- http://pimimozoji.myartsonline.com/19300316689.pdfIn PDF document text
- http://davinawoguzag.atwebpages.com/idylis_air_purifier_filter_replacement.pdfIn PDF document text
- http://dafesofuxub.rf.gd/is_wildlands_cross_platform.pdfIn PDF document text
- https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_8d1045161ff44154bf631d07db683574.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ed10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED10	5584 bytes
SHA-256: `0837646e7d4ac714cfea8be0674a700c5c74f0d7c18d04d89c616f5c3b83e640`
`font_01_sfnt_off00010021.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10021	10900 bytes
SHA-256: `418e4c8e20050d54b43dc7d172e845a27b90b422531a1a01e62bbbeef4fe8fa1`
`font_02_sfnt_off00012582.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12582	9060 bytes
SHA-256: `a6bff3a0f775c1238456e2764604d5076e3bd94054f36e289ab597ac94b92393`

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