Malicious PDF — malware analysis report

Static analysis result for SHA-256 5380e1a90f960098…

MALICIOUS

PDF

83.5 KB Created: 2021-04-20 13:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8712e46b4b830d4d3ba971008e1080b2 SHA-1: f1226fd1cae7a7ff02bd0dddd26d82542d5d7e9b SHA-256: 5380e1a90f960098a17d522d627b07fa0bf4e7ae4e149a0a5fe1a78506ce07d3
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. Several of these links point to potentially malicious domains and are designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=how+to+start+a+trampoline+park PDF link annotation
    • http://itfamily.info/northern_ireland_telephone_number_formaty6uzc.pdfIn PDF document text
    • https://venevivoxeda.weebly.com/uploads/1/3/1/8/131857756/mubagetobulod-gawemawepidep.pdfIn PDF document text
    • http://subbellassecret.com/logo_quiz_game_answers_level_26vw9w1.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/2030942.pdfIn PDF document text
    • http://flymoney.net/hatha_yoga_asana_sequence_vertical_postercq3hv.pdfIn PDF document text
    • http://ru-order-687646765445.art/what_is_a_good_luck_bracelet1fi7t.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/nordictrack_c900_parts_manual.pdfIn PDF document text
    • http://unlockdeals.shop/libro_el_alquimista_resumenxwf21.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/10067396369.pdfIn PDF document text
    • https://baxomowimesadud.weebly.com/uploads/1/3/5/3/135303612/setozuladodiwu_muzolagovevize.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/02c22615-76be-478b-8096-7c367825c66e/honda_hrx217k5vka_187cc_gas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc271f02-28a1-47fb-aa2d-45b673e15e98/feseroturexo.pdfIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_bb45a86da05f49068866e1a04a69260b.pdf?index=trueIn PDF document text
    • http://fuluxewamotate.atwebpages.com/bearcat_scanner_manual.pdfIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_d7f5f66c2d6c40fb8a62a0b00d58630d.pdf?index=trueIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_d09c519d609846ec8f6460bd53a40be7.pdf?index=trueIn PDF document text
    • http://vubelifijam.atwebpages.com/how_do_you_unjam_a_royal_paper_shredder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c023e0-cc38-489c-b854-eee735ebf797/lamoduxogelo.pdfIn PDF document text
    • https://de74b992-0de1-402f-a2cc-438209b178b2.filesusr.com/ugd/2693ef_dadbd12243f24ed9be2432523c7a9624.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/52502dee-3191-4dee-a2ac-a1f4d548417a/in_the_heights_film_age_rating.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 4872 bytes
SHA-256: f9cc4b084437fee19ae63ab2de5618370662a4e943606e0c49b88a9c25370be4
font_01_sfnt_off00010c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C12 11556 bytes
SHA-256: ab6b5df385f72276a27fab8250e942b7ef2c8853d92d4a797441934026899b3f
font_02_sfnt_off000132fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e