Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2b5ad7f66ecce7…

MALICIOUS

PDF

144.2 KB Created: 2021-03-21 08:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a84100645e399c70fe13fe1f4dc3c758 SHA-1: edc491e68743f16801244f1e172025eb2ffe4d13 SHA-256: 2f2b5ad7f66ecce7d84ed5a00c56d1c8933524a222a9293f4a9e86e0c070419a
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing or SEO spam campaign, indicated by the presence of a large number of external links, many hosted on disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/award?keyword=the+lost+city+of+atlantis+book+pdf PDF link annotation
    • https://legawugo.weebly.com/uploads/1/3/4/5/134509979/ronabedatidu.pdfIn PDF document text
    • http://leledup.mypressonline.com/aqueous_humor_dynamics.pdfIn PDF document text
    • https://pirowefe.weebly.com/uploads/1/3/4/4/134444143/4219758.pdfIn PDF document text
    • https://midezotadodagof.weebly.com/uploads/1/3/5/3/135326840/naxutaze.pdfIn PDF document text
    • http://difozoxezepi.getenjoyment.net/advertencia_miranda.pdfIn PDF document text
    • https://nidexopike.weebly.com/uploads/1/3/1/4/131407316/nunigulifevu-vefukutusu.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/sebovevagirazekum.pdfIn PDF document text
    • https://pabidiwamudobav.weebly.com/uploads/1/3/5/2/135299897/3650766.pdfIn PDF document text
    • https://sagetiruguw.weebly.com/uploads/1/3/0/8/130814856/27ffc4b745091.pdfIn PDF document text
    • http://xupulakikovuxo.mypressonline.com/spiderman_colouring_pages.pdfIn PDF document text
    • https://zafeponatamixuk.weebly.com/uploads/1/3/4/3/134396017/3ead12dc.pdfIn PDF document text
    • http://mateguwokalidub.getenjoyment.net/budgeting_in_project_management.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/7350135378.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_e45299de0d354f279a1f8416f065f70f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/930a3b3f-779d-4fea-b107-e6d265190e5b/how_does_stephen_hawking_talking_machine_work.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_97cf9988857d435f98e6fd4a70d65fc0.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_bdfe69dd09f64d1fb57e82d91ff4c94b.pdf?index=trueIn PDF document text
    • http://gurabagoderes.atwebpages.com/57402715588.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/vademapajobesam.pdfIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_a334ed595851411c9378169e803d1ee1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b48b1d20-5353-4006-ae95-0686b7b93c4a/ktm_990_smr_owners_manual.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_off0001eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEC5 5400 bytes
SHA-256: 1dde055e2e4e57ac097641e0d86a4be2a5fd742dbf99f3cd282e1f37c5225278
font_01_sfnt_off00020129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20129 17148 bytes
SHA-256: e806e4218670913253758cf7ce29a608ca6c9c9a34d24ef8c7c5d6d12f4d7e27