PDF malware analysis — malicious · e3a23ed3b183be4a

MALICIOUS

PDF

74.5 KB Created: 2021-03-10 05:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17

MD5: 31a70eaf27b70d3879a2ad0548c26c9a SHA-1: a65e5730e306f7bc089855c5821548bd9040264b SHA-256: e3a23ed3b183be4a9f0aaf540f7da7864b971576ccb6bb4103f58ade5c7c27b0

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one suspicious URL pointing to a potential phishing or malware distribution site. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting a tactic to obscure malicious intent. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further supporting a malicious classification. No scripts were extracted, but the overall structure and URL findings point to a phishing or downloader attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 6

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.
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://nipisod.ru/strik?utm_term=verb+to+be+worksheets+for+grade+3 PDF link annotation
- http://salonop.xyz/xazilewozanuvefaxeos2.pdfIn PDF document text
- https://sudomudes.weebly.com/uploads/1/3/0/8/130874284/ac6b0fce504.pdfIn PDF document text
- https://cdn.sqhk.co/vinogusi/hfjjjdw/dragon_hunter_crossbow_ge_tracker.pdfIn PDF document text
- https://bunupujitoj.weebly.com/uploads/1/3/4/0/134017728/8291879.pdfIn PDF document text
- http://itclick.pro/stickman_warriors_fight_5_mod_apk1nq31.pdfIn PDF document text
- http://akmurzina.com/67510154076y47ke.pdfIn PDF document text
- https://pimujupaz.weebly.com/uploads/1/3/4/4/134440235/fevosutosel.pdfIn PDF document text
- https://cdn.sqhk.co/tizuvuwo/Egdge5b/zara_larsson_back_and_forth_mp3.pdfIn PDF document text
- https://cdn.sqhk.co/xenaporo/IifidTn/strategic_management_process_real_life_examples.pdfIn PDF document text
- https://sowibize.weebly.com/uploads/1/3/5/3/135348762/bedopaw.pdfIn PDF document text
- http://toolsbestpricemicrometer.site/76723285722yei18.pdfIn PDF document text
- https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/cf0db.pdfIn PDF document text
- https://cdn.sqhk.co/nudizodi/FhgfOCz/best_gaming_live_wallpapers_for_android.pdfIn PDF document text
- https://cdn.sqhk.co/pipujevi/hghjjid/nudepizu.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/tokatefozude/cover_page_design_samples_for_annual_report.pdfIn PDF document text
- https://s3.amazonaws.com/tulosa/zuvurexujijito.pdfIn PDF document text
- https://s3.amazonaws.com/fatisake/comparison_chart_template_canva.pdfIn PDF document text
- https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_ccb0bf1fcdf74c8b88124999937e9804.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/potamotaz/why_is_leadership_important_for_a_sports_coach.pdfIn PDF document text
- https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_f4ceedca02b745468d9bf259f19337c7.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fidefofudi/45472001407.pdfIn PDF document text
- https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_3de08f3466de4e0f9e6d8915780b6e1a.pdf?index=trueIn PDF document text
- https://4694dce0-4d1e-4c77-b4da-d1f025f82355.filesusr.com/ugd/fb332b_4e387820f5ea4689ab12204fc36ba671.pdf?index=trueIn PDF document text
- https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_68d79a55139e42e0808b8fccc5fd5e92.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_off0000e45c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE45C	5560 bytes
SHA-256: `7ad2e7376338d71b0c6ffa7f36ec2d4abb0c05741a2f95ab9a2d55a0652bc93d`
`font_01_sfnt_off0000f764.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF764	10872 bytes
SHA-256: `9e6d1fdff655579197c4a5039b1446cd81999dd69373c8b998e4f72dd13ff771`

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