Malicious PDF — malware analysis report

Static analysis result for SHA-256 055992267408a0a2…

MALICIOUS

PDF

113.0 KB Created: 2021-05-01 02:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8931953ee166e726204481780ec0c889 SHA-1: b14eda43d4ae8abe54ebf354b276605434c11dd1 SHA-256: 055992267408a0a2e75352c14dacc5dee7679529eebe9fd11bfa1449bed57709
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 0.9954

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=salmo+91+biblia+catolica+oracion+de+la+noche PDF link annotation
    • http://coolvdomaion.online/312393443882wp5q.pdfIn PDF document text
    • http://servempieza.site/vatazissu5f.pdfIn PDF document text
    • http://sparzha.club/how_much_is_nigeria_navy_trainee_salary4igpb.pdfIn PDF document text
    • http://psychologyrelax.xyz/21838769076mx6h6.pdfIn PDF document text
    • https://bogezozoxo.weebly.com/uploads/1/3/4/4/134479702/314f65fb641092.pdfIn PDF document text
    • https://mopomavimixefor.weebly.com/uploads/1/3/1/1/131164117/sebojimax.pdfIn PDF document text
    • http://yoga-italy.space/wikuremirudavapz7s8.pdfIn PDF document text
    • http://espaceabonnes.com/60249600390xa0wo.pdfIn PDF document text
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/6f9d2351da7454.pdfIn PDF document text
    • http://mon-compte-cmb.best/38953028495d23qz.pdfIn PDF document text
    • https://munefetuwavebif.weebly.com/uploads/1/3/2/6/132683017/6916896.pdfIn PDF document text
    • http://zesamoa.online/pixajizr6ak.pdfIn PDF document text
    • http://copyrightnotice-ig.com/98879114435av6g8.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/ruwubo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikejozejabator.rf.gd/pitomosijuvoludomifa.pdfIn PDF document text
    • http://maxoxutiwo.rf.gd/28407717936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a81520-f453-4383-b998-c20d7e54f4d1/85955292249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee201ec-738c-4fc0-9414-12bcf3212be0/my_dryer_wont_turn_on_it_just_buzzes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9fce625-e9a3-4760-86bf-45d04274131c/pinavezabosaguwag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13169c7f-4f18-442d-94f4-78da14de71e3/20263694844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a2be5d-8a77-461a-80bd-1834de228145/revuvufelasufug.pdfIn PDF document text
    • http://mowiredeponup.rf.gd/answers_to_tesco_job_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a294a99c-3493-4ea0-893a-c260ef1645ce/how_to_start_a_conclusion_paragraph_for_an_analytical_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739daeb9-dcd2-42b8-9d6a-e8f6261aae6b/stephen_king_christine_characters.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13524 6588 bytes
SHA-256: 24fd6868f187b5667792517f9f69d22ac5a3de5011d4d3824467392effeade79
font_01_sfnt_off0001459e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459E 5452 bytes
SHA-256: df9abd208e3c1a32cfca96c96be2699279afc743cfac67aa0b257bafb8001b80
font_02_sfnt_off000157f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F0 8320 bytes
SHA-256: 3090a3a96cce667dea995baef2801ef6e0efb72f41a3281d86a404b0800414ec
font_03_sfnt_off0001740c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1740C 14564 bytes
SHA-256: e02748e27bcd5abca70e98c25c3f5d35acb751ed50154235118eb328fc4f434a
font_04_sfnt_off00019fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FDD 16148 bytes
SHA-256: 27f0f23533f01b2f39d6d15410c1f42ac10fd3ebe76f9f39d699b294f2c73286

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