Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5e07e9438b4ee8…

MALICIOUS

PDF

80.3 KB Created: 2021-03-20 05:07:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9c910a61913d8300b9cf8787dd7c6e2b SHA-1: 9610f3703f1fe282c44e5c3874f3832b75cf82bc SHA-256: 2d5e07e9438b4ee803b0f42e64c89cf7f3f67c48cd0aba682b59f428f8615f83
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=blue+yeti+manual+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/xovikojux/ifghrib/joker_tik_tok_status_video_download_mp3.pdfIn PDF document text
    • http://storeyou.store/which_water_dispenser_is_bestyl71h.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/mihEigi/73743733099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403822/normal_5fe6f848e987f.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/2ge5ugc/abba_greatest_hits_1976_lp.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/bar_chords_chart_printableqximv.pdfIn PDF document text
    • http://allrecipes.pro/lalofitozisatu479zu.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/bgihNgj/57587183595.pdfIn PDF document text
    • http://vasuxarogaxatix.iblogger.org/tasnetworks_annual_planning_report_2019.pdfIn PDF document text
    • http://pitupunum.iblogger.org/panelview_1000_software_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_600dcd91116ad.pdfIn PDF document text
    • http://xusekulatubobip.22web.org/95067166967.pdfIn PDF document text
    • http://bumaga.bz/87079171027hsqam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_95035032e1714a6e8aeb454952b2e90c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/014074e5-6310-44c4-8494-938b0024569a/76062272896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1218dfad-22ad-4ddf-a2ce-193eebb40ed5/43476579502.pdfIn PDF document text
    • http://pakidenekarudi.epizy.com/divumatimerafefupuwudibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2630e09-d9ff-46f3-8b90-980f964107eb/macbeth_act_2_scene_1_study_guide_answers.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_f40b81b058a8447196f367ee71de18f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0027334f-e38e-4e19-8508-977923321909/rubejebujuxujumusigetej.pdfIn PDF document text
    • https://394fded3-a37f-45fe-8092-07e0884d2d31.filesusr.com/ugd/bdbc91_bd5217af5e424307a0862ab8a49527f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d19fb0b8-bf8c-4b4d-a1e3-9517f033475a/76273672716.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.

FilenameKindSourceSize
font_00_sfnt_off0000f65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65D 5232 bytes
SHA-256: 469a3712a2cdeb4609f93522d39f6cf7b6f44836f4063124e41e78b4f8c31d36
font_01_sfnt_off000107dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DC 12984 bytes
SHA-256: ada25bf0facedfc73d149e50bbbdbc60ed057c2242308af0bdcb8130a5107d6e

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