Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abc3106a62f5291…

MALICIOUS

PDF

65.1 KB Created: 2021-04-26 06:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0324f70bb20468a732c961e31367c42e SHA-1: 2dc9e771dcdb934d6e892cc4d67c0ce53b82d869 SHA-256: 3abc3106a62f5291a265eb09f7d8108c1d141beaf58d25b0c78fadcee2c2979e
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 pointing to disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/strik?utm_term=civ+6+expansion+gathering+storm+leaders PDF link annotation
    • http://janorewaxeno.mygamesonline.org/89946244848.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/how_to_cite_a_website_with_no_author_apa.pdfIn PDF document text
    • http://lakuberik.mywebcommunity.org/nakusulafidirage.pdfIn PDF document text
    • https://xepuzuzolewu.weebly.com/uploads/1/3/4/3/134324818/5800526.pdfIn PDF document text
    • http://babysampler.com/22991523077q913y.pdfIn PDF document text
    • http://moxegelubopidi.sportsontheweb.net/how_to_reassess_your_chess_free.pdfIn PDF document text
    • https://todoxaladavefuk.weebly.com/uploads/1/3/4/5/134529573/nesupidotaveka.pdfIn PDF document text
    • http://persequen.com/filmii_afaan_oromoo_haaraauobcb.pdfIn PDF document text
    • https://movuvoxuwonorad.weebly.com/uploads/1/3/4/6/134667433/juvaxaxamaxevo.pdfIn PDF document text
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/b57d6831a7eb.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/lovomevuloja.pdfIn PDF document text
    • http://sexedate69.site/die_unendliche_geschichte_2_film_online_anschauenk8o66.pdfIn PDF document text
    • https://dumexegutotopu.weebly.com/uploads/1/3/4/3/134354144/wuvib_bevogigupuvib.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/94ef46b3-9d86-4c30-a212-9753620e25ce/57405671674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4bd2b5-f947-42d6-bb6b-194dd2f88e99/macbeth_act_3_scene_4_summary_short.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/3d_maker_for_autocad_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c719238a-eef4-4820-9932-c807ccbc4a99/uke_tunes.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/panasonic_hvx200_century_fisheye.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc284ff1-841a-405a-91dc-b81f9cc369bb/sig_p229_enhanced_elite_magazine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583d4db1-a082-4231-987b-b52ed91d1ab0/does_the_v_shred_diet_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2580a0db-4fc4-4c39-9c19-d2a54ee9718f/what_are_guided_learning_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b550173-1011-4b72-82c4-8d07c66fdb55/48646349773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad18c213-be85-47c3-a7e1-cf81034ea2d2/sasajojegofewawifurubu.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_off0000c479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC479 5560 bytes
SHA-256: cac453f144d9f5d8708258410756fe755e24449b310c888b8dd8a9574ca64e6a
font_01_sfnt_off0000d73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73A 9304 bytes
SHA-256: bdb9ff8e03ba77a7461f8b9e553a4f7026fa8d4d47908c1bc6db61e5a685464e