Malicious PDF — malware analysis report

Static analysis result for SHA-256 62833cfc3a551739…

MALICIOUS

PDF

75.6 KB Created: 2021-03-09 06:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 011dd24fdaddab6d5bc26710a8127d75 SHA-1: c441a232fea41d30f3e0deeee9de78518e7e41e6 SHA-256: 62833cfc3a5517392357c7056f983c21ce7d23cc3e7e7027ad4dfa008b287f85
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/strik?utm_term=eye+of+the+beholder+snes+cheats PDF link annotation
    • http://secureappeal.com/51713850702dks25.pdfIn PDF document text
    • https://zifusiwi.weebly.com/uploads/1/3/4/6/134686012/xetose_zoxunataropi.pdfIn PDF document text
    • https://mubuvume.weebly.com/uploads/1/3/4/8/134885019/7957011.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/gibebalunijit.pdfIn PDF document text
    • https://ribofefafuf.weebly.com/uploads/1/3/4/7/134770843/defivukoxax.pdfIn PDF document text
    • http://inmyshtangen.xyz/how_to_fix_devant_tv_no_pictureuomk4.pdfIn PDF document text
    • http://save50it.pro/wezugav2k3z.pdfIn PDF document text
    • http://atlas-copco.su/gulogazadolovorebijulfibbt.pdfIn PDF document text
    • http://hookup757.fun/antinuclear_antibodies_test_reportsvoaxz.pdfIn PDF document text
    • http://effektzhizni.ru/liver_cleanse_help_gallbladder68zy6.pdfIn PDF document text
    • https://nupowanekajotut.weebly.com/uploads/1/3/0/8/130815303/9776510.pdfIn PDF document text
    • http://stassikorskyi.com/ninja_turtles_movie_download_300mb0h4n0.pdfIn PDF document text
    • http://1xbet-regi.site/doguma8e5p.pdfIn PDF document text
    • http://tradestaroffice.com/9775726567139hd8.pdfIn PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/0af82b62.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/469830.pdfIn PDF document text
    • http://ritual-venki.online/sample_business_plan_for_startups48bm.pdfIn PDF document text
    • https://geworusidexaj.weebly.com/uploads/1/3/5/3/135306562/2550543.pdfIn PDF document text
    • https://wiwokuvivatazu.weebly.com/uploads/1/3/4/6/134629214/913453.pdfIn PDF document text
    • http://robot3.site/79420528649c61x8.pdfIn PDF document text
    • http://teaitalis.space/catholic_encyclopedia_volume_3dbsbc.pdfIn PDF document text
    • http://hurricane1.space/77136644722h6pwm.pdfIn PDF document text
    • http://presalle.xyz/63509136173heerl.pdfIn PDF document text
    • https://dofikusoru.weebly.com/uploads/1/3/4/4/134472045/rofixigukuwuda-buvapipo-rireva.pdfIn PDF document text
    • https://jejofiwapo.weebly.com/uploads/1/3/5/3/135312812/sunalaxogadijumulusi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 5308 bytes
SHA-256: 848ee50bac24b4f62f99781d8ccaa0b2fcdfc364382bc4aaf791328f8b36be3f
font_01_sfnt_off0000fb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 11032 bytes
SHA-256: fbf259b0dae10a2849c1488d2fb58896b3bce6db00d862bca0457d74b1bd394b