Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc06b4f73c2d249…

MALICIOUS

PDF

82.2 KB Created: 2021-03-28 17:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a2d1ca61e99f9f14a360d4c507e6011d SHA-1: d54e56b832e27153eabde8ca73b274cf839517f2 SHA-256: 6cc06b4f73c2d24961f80db6f43bdcce0013779abd297ebc0460e05d0c7936ef
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were extracted, the heuristic firings and URL analysis suggest the document's primary purpose is to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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 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://crophysi.ru/strik?utm_term=celestron+astromaster+114az-sr In PDF document text
    • http://help-verification.com/febinerutipokelovivuwibiwmx5g.pdfIn PDF document text
    • http://blockhcain.host/93768287487pj8zo.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/wudekuji.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://wulutano.mywebcommunity.org/future_simple_exercises_perfect_english_grammar.pdfIn PDF document text
    • http://ig-mediateam.net/21102479721t7p5z.pdfIn PDF document text
    • http://kepovimobezozo.iblogger.org/piya_basanti_full_hd_video_song.pdfIn PDF document text
    • http://j3vnci4.xyz/karcher_pressure_washer_repair_canadajo404.pdfIn PDF document text
    • http://talkme-news.info/kerbal_space_program_planet_namesugl4k.pdfIn PDF document text
    • http://gawivekarebuvus.22web.org/excel_vlookup_formula_example.pdfIn PDF document text
    • http://epaytds.xyz/ewha_korean_textbooku681t.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
    • http://monufaro.epizy.com/95639479349.pdfIn PDF document text
    • https://01477de9-116b-42a6-a62c-54244336611e.filesusr.com/ugd/dea9e9_604c06844cc546b5b148469a6f08d110.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovisak/21732107151.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/31217261605.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_a655ae9b907b445c8d87ab3703ddabb0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ninasivol/interior_designing_degree_colleges_in_mumbai.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_76dc17c303f04753a4f685ede0a51825.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/path_to_glory_download.pdfIn PDF document text
    • http://tejinumifed.epizy.com/11199834282.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/how_to_produce_canola_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/what_is_an_example_of_feminist_criminology.pdfIn PDF document text
    • http://furexuzajob.epizy.com/87935406313.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/que_es_logoterapia_en_psicologa.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_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 4816 bytes
SHA-256: ce00a1edcb07be98f85373815f3484b987495a33eb33d3850c3515fe05d75338
font_01_sfnt_off0001064a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064A 11484 bytes
SHA-256: 6a7617e68d6113441056292a6ea19e50e725acaf61915e599e09ad3c1d0cb8b2
font_02_sfnt_off00012d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D71 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3