Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd5dba3888cb041…

MALICIOUS

PDF

68.0 KB Created: 2021-03-02 12:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1db8e346fc1ef80e5463530592fafccf SHA-1: 512241e6d7da94987e4f80f498e498d8390504af SHA-256: 1bd5dba3888cb0416e1b164b22e494d2f0c009a324989e2263a37447462e9a20
186 Risk Score

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
  • 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://baarspo.ru/wix?keyword=words+that+start+with+gn PDF link annotation
    • https://cdn.sqhk.co/lagazowasobo/nj4mjdc/63594743536.pdfIn PDF document text
    • https://xibijogoxedugo.weebly.com/uploads/1/3/4/6/134662411/b1668a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487005/normal_6009a7a04008b.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/7609f64a.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/37hd1rZ/pixel_shot_3d_uptodown.pdfIn PDF document text
    • http://zaxofebejip.66ghz.com/how_to_use_safety_first_digital_ear_thermometer.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jczWhac/gigabyte_aero_15x_smart_manager_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/fYgdjdB/civil_war_1863_campaign_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/3hafWEW/tamobol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448720/normal_60293b9ae6d52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://memaded.epizy.com/nokujuwolutudemonata.pdfIn PDF document text
    • http://bokubipojofoji.rf.gd/neteller_mobile_app_apk.pdfIn PDF document text
    • http://verirajoxa.epizy.com/56858730177.pdfIn PDF document text
    • http://milatosokalazer.epizy.com/bissell_poweredge_pet_hardwood_floor_stick_vacuum_cleaner_canada.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/43561930163.pdfIn PDF document text
    • http://mulusatore.rf.gd/prometheus_alertmanager_email_template_example.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_off0000ce6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6E 5160 bytes
SHA-256: f11cffd38ca286f3d2971cd9d2b5d688024ac9bbdae2d04cf5617ae9adbb38a3
font_01_sfnt_off0000e00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00B 10348 bytes
SHA-256: 33d94b63ad2c84898f59a47ef4f7398c8305a0dcaf5584a72261252ed33993d4