Malicious PDF — malware analysis report

Static analysis result for SHA-256 aede2ff217de5957…

MALICIOUS

PDF

92.0 KB Created: 2021-02-18 18:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 98c2ba74459f6d7cc24815cbed8a0c7b SHA-1: b1b9e1264f3ff4ee4cd62fb5def7dfa5e17f6e53 SHA-256: aede2ff217de59573224aeb74c729fbcd0126eca79ed36e4a3db2f6527474632
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many pointing to disposable domains and redirector infrastructure, indicating a link farm designed to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of numerous external links, including one to a known malicious redirector, supports the attack pattern of luring users to compromised sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=honda+gx340+parts+list+pdf In PDF document text
    • https://cdn.sqhk.co/rafumufo/c0NxaiV/9th_maths_ncert_solutions_chapter_8.pdfIn PDF document text
    • https://cdn.sqhk.co/nawafoxobok/xjidHaU/parents_kit_ad.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/apDif8M/csr_racing_2_3rd_anniversary.pdfIn PDF document text
    • https://wokonupojelofa.weebly.com/uploads/1/3/5/3/135351156/f9f79578.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/hfmhhge/forest_background_hd_video.pdfIn PDF document text
    • https://wezogefizu.weebly.com/uploads/1/3/4/2/134234847/5414294.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/jjhgeJJ/pocket_rogue_simple_roguelike_download.pdfIn PDF document text
    • https://bulabameworiw.weebly.com/uploads/1/3/4/0/134096114/15e5731ea54b20.pdfIn PDF document text
    • https://cdn.sqhk.co/remokuvupen/eFnihiy/hungry_shark_game_download_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvinudubuno/fhdqjeC/missile_defense_agency_org_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/jev3hdZ/webcomics_for_kids.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ludatijodibop.rf.gd/wufuxelukilanitov.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/88862728363.pdfIn PDF document text
    • http://zudosikewemer.epizy.com/herbalist_challenge_rdr2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/jujen.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/xulaliludi.pdfIn PDF document text
    • http://kusegewamuzazod.epizy.com/wolabosabopopijebosiz.pdfIn PDF document text
    • http://meladuk.rf.gd/tarzan_the_ape_man_1959.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_off00012a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A86 5632 bytes
SHA-256: 9dba68b88a508c7ba2859f6d86c4ebb132f4f4735d0584c14019414af5ae4535
font_01_sfnt_off00013dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCB 11252 bytes
SHA-256: 39bbf89a9007827869d633e951430f88a979111d3324f82fe8932d022967dd64

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