Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ce77ee60bf17fc…

MALICIOUS

PDF

78.9 KB Created: 2021-03-30 16:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1b999f78f0f7990b8f76e34a8bbc1858 SHA-1: 491de9c77cc41f51d288a876fc351b7130262dae SHA-256: 96ce77ee60bf17fcc3abf4f5da7537a024ff264ed62423185ae64c6a7e34591b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://crophysi.ru/123?utm_term=badlapur+video+song++hd PDF link annotation
    • https://cdn.sqhk.co/wesuwajil/fje1eN6/8738622379.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/jcngcjf/dv_lottery_photo_editor_for_windows.pdfIn PDF document text
    • http://xodesat.22web.org/how_many_questions_are_on_the_food_safety_test.pdfIn PDF document text
    • https://vimudizod.weebly.com/uploads/1/3/4/6/134632239/7453171.pdfIn PDF document text
    • https://cdn.sqhk.co/kadefowuvun/hcsijie/99933036310.pdfIn PDF document text
    • https://cdn.sqhk.co/filemowa/ggLSKWl/54748559003.pdfIn PDF document text
    • https://bejasesazopo.weebly.com/uploads/1/3/4/5/134512805/7995247.pdfIn PDF document text
    • https://soletobapikod.weebly.com/uploads/1/3/4/5/134582957/e8c576e047.pdfIn PDF document text
    • https://cdn.sqhk.co/minutakumu/YN70gd7/vegejaxapatanabazem.pdfIn PDF document text
    • https://ligetivegivug.weebly.com/uploads/1/3/4/0/134041815/sirujati.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/ruzabebazokixoliwulubix.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/hchbggx/memmedbagir_bagirzade_gorusersen_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/riwaxagi/DQbggjy/dulel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa8d422-6d6e-4fe3-bc52-8f22ac2b4595/51368067507.pdfIn PDF document text
    • https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_b35f7cc45c60426faf1d11e54fd0933c.pdf?index=trueIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_67a73a12fc2843cba85aad4a9fedb4e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b6bef22-f0aa-444c-a0c0-150f460b34af/how_many_calories_in_a_donut_hole.pdfIn PDF document text
    • http://zopusawonomiwi.rf.gd/beautiful_nature_hd_wallpapers_for_android.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_off0000f867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF867 5328 bytes
SHA-256: e46210bd3f2f079d3f0ed18a0d5c9ca16db674947faee00ab4600e983d048e76
font_01_sfnt_off00010a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A88 10696 bytes
SHA-256: e58a79ef88ff62d6ef60ed0dacde8b73c7760f61b8af038e22b754a014566b0c

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