Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c782fcf1c2646b1…

MALICIOUS

PDF

98.0 KB Created: 2021-05-13 01:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a5bd87539abefcb8835cdf5ea5f38412 SHA-1: 2c5cf130e5fabbbec3ba51fdf6df54ca8608e3dd SHA-256: 2c782fcf1c2646b1df5119936520a9a18b56c5fbd346ac1f36b9df5d48e37da2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the heuristic firings for PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://botokaw.ru/strik?utm_term=microsoft+office+2016+free+download+full+version+with+product+key+crack PDF link annotation
    • https://wubepina.weebly.com/uploads/1/3/4/7/134721378/4213097.pdfIn PDF document text
    • https://vavaterojitenoj.weebly.com/uploads/1/3/4/8/134898986/jivawagafaj.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/O85hchi/galaxy_at_war_online_radar_station.pdfIn PDF document text
    • https://cdn.sqhk.co/monubinejon/h0ianjh/introduction_to_business_process_management_ppt.pdfIn PDF document text
    • https://jizenovu.weebly.com/uploads/1/3/4/6/134682428/zenatikedog.pdfIn PDF document text
    • http://vowitufafuzebil.scienceontheweb.net/4603171645.pdfIn PDF document text
    • https://cdn.sqhk.co/fotajoge/hagUUnj/kuvarudavabojinilomawig.pdfIn PDF document text
    • https://rijijuxika.weebly.com/uploads/1/3/5/3/135346754/6454967.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/hahiBjh/persian_calendar_leap_year.pdfIn PDF document text
    • http://mitisavad.getenjoyment.net/warcraft_3_how_to_unlock_all_campaigns.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/vasodatilol.pdfIn PDF document text
    • https://cdn.sqhk.co/kilobubag/pPigkid/45077824607.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/1Bs9cNP/change_lock_screen_password_iphone_11.pdfIn PDF document text
    • https://vonorakukipi.weebly.com/uploads/1/3/4/7/134721252/kenax.pdfIn PDF document text
    • https://galezarulunozip.weebly.com/uploads/1/3/4/8/134896955/febokeg.pdfIn PDF document text
    • https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/0b15a5d8.pdfIn PDF document text
    • https://cdn.sqhk.co/norumuwapa/emRAKrj/play_minecraft_egg_wars_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e71c44f2-e1fc-4e79-aabf-db96b990c80c/where_is_the_filter_on_frigidaire_front_load_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9212314c-2997-4de3-834a-18f2cb9e10d1/cules_son_los_animales_que_estn_en_peligro_de_extincin_en_per.pdfIn PDF document text
    • http://doritiwenoxa.onlinewebshop.net/article_grammar_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9bb7c9f-fd35-49eb-b957-54ec44efd4cb/nuwigofedotetopofit.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6D 5928 bytes
SHA-256: b7a5e5fbce1c91596dbb67eec3c914d8e288084e7b7fcdb54d69f89555441b8b
font_01_sfnt_off000130ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AB 11088 bytes
SHA-256: 354f7693c674051ab081bb585ad67f47a926241ef3ec06e670cbe34f5965b5b6
font_02_sfnt_off000155d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D4 16168 bytes
SHA-256: e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443
font_03_sfnt_off00016ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AD9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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