Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ee5ec630bdc4ba…

MALICIOUS

PDF

110.9 KB Created: 2021-03-16 11:08:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a1b32363fc4efc16994016031e39782a SHA-1: c25d8248118faedce96c72ca053101e102fb4a63 SHA-256: a1ee5ec630bdc4ba899bb2655a3ac124a89389418ce8e98b60141b5de9f5dab4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a specific PDF document, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://gimoguvi.ru/award?keyword=annapurna+ashtakam+in+telugu+pdf PDF link annotation
    • https://cdn.sqhk.co/tinipuded/DSjd2ic/ding_dong_hostess_calories.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_6018395e57488.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/febajofemajonip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_5fda8b227bca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446374/normal_600c7568a9503.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/i4jcqDv/galilurejuwuxoriref.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_5fe278b755208.pdfIn PDF document text
    • https://poxuroli.weebly.com/uploads/1/3/0/7/130738943/lupuwajogajo-fugiwulub.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/ga9gejj/low_dust_sheetrock_mud.pdfIn PDF document text
    • https://jebasiju.weebly.com/uploads/1/3/1/3/131381450/9855544.pdfIn PDF document text
    • https://cdn.sqhk.co/vapadexeb/iHjeZii/galaxy_parallax_live_wallpaper_pro_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/d3ifjdR/download_naval_frontline_regia_marina_mod_apk.pdfIn PDF document text
    • https://kufurana.weebly.com/uploads/1/3/1/4/131482954/e0772b952ae6b14.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://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_9041d73fc7a3439ea7eba60376161c32.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2f890b-dfc6-4a90-8ebd-800d83306ffe/32471287212.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/9329401480.pdfIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_0522ea71d08a41628d4b400532a0a802.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62306d89-d8f8-4502-aece-6695054ef997/29160693163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e917b7-462a-4c6c-85df-ba4d7595ebd5/xotowefaka.pdfIn PDF document text
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_180c33d382894c569cbb29f75f6db7e2.pdf?index=trueIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_7bef62c364f148e4877b49988ae08533.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/760c82b1-d3b1-4cde-b1af-d71b7f0e015d/37740290109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fe21d4-97c2-46de-8199-7fe0c054d237/galileo_life_summary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 5508 bytes
SHA-256: fe9beb862d161c8b842e81bc7119df723765bb4431361d757b670317c1c7c1ba
font_01_sfnt_off000113e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E6 66288 bytes
SHA-256: e487b024b801d0753125675eeece9c01e37b19aed859722a504e2cbd3418885d
font_02_sfnt_off00018914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18914 10536 bytes
SHA-256: 88f896744886e8962380d75919e18d343b10f3faef5c2efdd7a513a286bc2320