Malicious PDF — malware analysis report

Static analysis result for SHA-256 03806bb6a745ebc4…

MALICIOUS

PDF

77.2 KB Created: 2021-03-18 07:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 36fd14ab279dabf385ec5632614b864c SHA-1: cad793e97e07dee23c82a5b30d9d13f50ddc3a9c SHA-256: 03806bb6a745ebc4c6f69736aaae3120317295b3062766fecf2486e115ea8182
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, 'https://baarspo.ru/wix?keyword=provo+full+zip+code', hosted on disposable infrastructure and flagged as suspicious. The presence of external URIs and the overall structure suggest this PDF is designed to lead users to malicious content, likely for phishing or to download further malware.

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://baarspo.ru/wix?keyword=provo+full+zip+code PDF link annotation
    • https://joxobupapi.weebly.com/uploads/1/3/1/4/131454586/fusugorefutoxilala.pdfIn PDF document text
    • https://cdn.sqhk.co/nasonamav/jgc1kje/50085735010.pdfIn PDF document text
    • http://fortuneo.best/569302627781h4ep.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/pQuOihx/56518858085.pdfIn PDF document text
    • http://menformula.xyz/recognize_the_common_purposes_for_writing93p74.pdfIn PDF document text
    • https://kutufexefe.weebly.com/uploads/1/3/4/6/134695169/rekekidosexoretogipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_5fe909f656666.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/7315292.pdfIn PDF document text
    • http://umkatrade.ru/nevemagidmrd3.pdfIn PDF document text
    • https://cdn.sqhk.co/kigifadarija/nbGngea/28721881427.pdfIn PDF document text
    • https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/rumasemiwunepafebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_601465d12b02f.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/vitamix_blender_container_replacement.pdfIn PDF document text
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/1648283.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/adjective_clauses_examples.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/d9d41676-0dbc-45f5-8aba-6a208f732cdf/35191164352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ea5153-853a-44a0-8301-472e2d6e9fb8/reinforced_concrete_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f6246f-9c4f-4323-923c-648c97425d2a/57719193301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c8cbf9e-73fd-4460-a529-e1c6aacbdca9/gulupapileririmuzafedos.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_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 4872 bytes
SHA-256: 785db340340f81a476828cb09d1cdc035de2e3cec03f3ac0ed5b0314e1319164
font_01_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 10584 bytes
SHA-256: df84417f420f9cc64e6c34e66e54874811e6b432269fbb096f511b32c8f3a7db

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