Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6aeebd023797acc…

MALICIOUS

PDF

78.9 KB Created: 2021-04-01 03:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 143c54446b23d21bf22c809dcd66009f SHA-1: 4cfbf9b55347a4d3d2e825a86deb8b90bff5333e SHA-256: e6aeebd023797acc7636468fc10798f3295a4811b5b3fb811045fb6eda43c0de
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious intent by distributing links across many domains. The primary URL, https://lozipotod.ru/strik?utm_term=bedford+book+of+genres+with+readings+2nd+edition, suggests a lure related to book titles to entice users to click, likely leading to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://lozipotod.ru/strik?utm_term=bedford+book+of+genres+with+readings+2nd+edition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485436/normal_604378f517dea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_5fd2418b434e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421937/normal_60029be8ca6fd.pdfIn PDF document text
    • http://sujuwufuki.iblogger.org/chemical_nanosensors.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/75505687513.pdfIn PDF document text
    • http://fuxuxixigu.scienceontheweb.net/difference_between_pmf_and_cdf.pdfIn PDF document text
    • http://xokijaxano.medianewsonline.com/tukik.pdfIn PDF document text
    • http://xokubenafap.66ghz.com/vijenivolanevade.pdfIn PDF document text
    • http://polibesafonujof.iblogger.org/52277456801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_604a40e881ae9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389095/normal_60078427313f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_605c1f9007fff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/angelcare_baby_movement_monitor_ac401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb784e8-dd4d-45a1-af71-0b3e68a6b221/12324734507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1318c566-d893-4928-b21c-2f904a72cdd1/91224618859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4061d9a6-96c8-4d86-9732-01084ea30ad5/33756852734.pdfIn PDF document text
    • http://goxakimolo.epizy.com/clickup_project_templates.pdfIn PDF document text
    • http://jiwodiw.myartsonline.com/62862362030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35fd77f8-fbef-4824-bd48-c57fbe21d386/5004337261.pdfIn PDF document text
    • http://wigunegulawiko.rf.gd/how_to_cook_lamb_rack_slow_cooker.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_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 5612 bytes
SHA-256: de09db26e7b3dffe6f9f301920adedbbddaa9a34c6305ef50fcf5a3444be3842
font_01_sfnt_off000108bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BD 11012 bytes
SHA-256: f049cb6e59236baa9a1c08dbe073453f3abb0004bdd0bde80cd29e18e816d300

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