Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e02223524386ee3…

MALICIOUS

PDF

80.1 KB Created: 2021-04-04 06:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ae0efa23d3217a85a8ee11b024202f3d SHA-1: bf2e9329ac694e78ae61e57fc1fc74dec0dc69e2 SHA-256: 5e02223524386ee3191fd59c48c7b41dc8504326a2eb9fe7c3370c8d64ad46f6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

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 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.
  • 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://golowaki.ru/strik?utm_term=what+is+the+job+role+of+customer+service+associate PDF link annotation
    • http://shoes-storie.club/sijelitolinoxece8t.pdfIn PDF document text
    • http://lowwsaw.xyz/how_to_use_a_bissell_pet_3_carpet_cleanerhxo64.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/crs_reporting_deadlines_canadaofm34.pdfIn PDF document text
    • http://mudubafap.iblogger.org/the_world_in_2020_economist_download.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
    • https://s3.amazonaws.com/lomogas/nipivoperogebigomade.pdfIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_15a6c7c37e234b8e8a801ff6c91d4465.pdf?index=trueIn PDF document text
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_b44098dcdbd345059dea51b2b343307d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/topology_and_its_applications.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/airserver_connect_free.pdfIn PDF document text
    • http://fapujeg.epizy.com/65245239586.pdfIn PDF document text
    • http://pitowurojagit.epizy.com/immigration_uk_questions_and_answers.pdfIn PDF document text
    • http://gedemawudad.epizy.com/57687947371.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/tobaderugoxokukasuxox.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_fd61a987d2d14fb191fe3b694ed088d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5da5f16-b3cf-4212-9599-f532b8779744/bipadamikevirasazoritaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a825f46a-b6ea-4fcf-93f0-8e0d56cf265b/tijumijiwoguvusevugakel.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_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 5184 bytes
SHA-256: a4153e5413d328f1dd5ca3327ec5ead519b1d3c64d821ddc40eb1354c0ba1028
font_01_sfnt_off000101f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F3 10264 bytes
SHA-256: e734e354bbba01a859ee65aba6e529b23befce079331a291ccc854f71a655010
font_02_sfnt_off00012503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12503 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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