Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3b0949fd85101a…

MALICIOUS

PDF

73.9 KB Created: 2021-03-19 12:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cc571f17e44518cefce52ce6f5ab6b5b SHA-1: 3d31e5e7bd81442922c66d0333f30b89b1260f54 SHA-256: ea3b0949fd85101ad78d5af5e12a58ad944bc6729612e29ff6245c0c09c6918a
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=sonali+dance+choreography PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409614/normal_6009b46b40989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455370/normal_5fd880890f1b2.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/what_is_a_frayer_model_graphic_organizer.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/pdf_splitter_download_free_full_version.pdfIn PDF document text
    • http://mibemuxagegija.mywebcommunity.org/zawisewuvakedazuvuvuki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_601990a6c06de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_60461cc7419cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461229/normal_5fcd294c3338f.pdfIn PDF document text
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/3876609.pdfIn PDF document text
    • https://wotapidedodibi.weebly.com/uploads/1/3/4/4/134475573/vurixawax-kulujugobi-selukukikeve-zures.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452385/normal_5ffd66e7e0251.pdfIn PDF document text
    • https://minojesifivu.weebly.com/uploads/1/3/4/8/134860027/f58fdcd8083fd2.pdfIn PDF document text
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/zivawonitelew-fiwugaf-xusiwekokebe-duxoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502721/normal_6028bef528ded.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485301/normal_5ff5f766b443d.pdfIn PDF document text
    • https://zovuwiveja.weebly.com/uploads/1/3/4/8/134880504/zawosiluwomew_gajut_paneluwaxasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484103/normal_604920c96fdbd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3d9f74b-6534-4daa-ba36-a4382656f454/5_techniques_of_time_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbcfe34-a5d6-4f02-89c8-e58601a48e89/98467726072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e004c8-c90c-4623-bb4e-efdfcb6da12e/wirovigizujigafin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7acd6b7-eaea-41c2-8685-a7a2a6180c08/is_cloud_nine_still_open.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_off0000e359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 5360 bytes
SHA-256: 346bc28520b2278943c00cb7e229fa1cef1447752e72d8c24b88285287bec523
font_01_sfnt_off0000f599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF599 10812 bytes
SHA-256: 92e47bb94b914e47f73b130e703432ab7bb3c661e1896f86c3e484e5b0d855a6