Malicious PDF — malware analysis report

Static analysis result for SHA-256 79486777b375cd64…

MALICIOUS

PDF

44.3 KB Created: 2020-10-26 16:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dc31ddc2e463b4ef5f5225dae5ccc728 SHA-1: d65cbdb5b267821d282474adbcb5034bd70356d1 SHA-256: 79486777b375cd64d9233eba8366812eb49f3978ee2a26a2158c58aa461addf7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=wilcom+embroidery+studio+e1.5+dongle In PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/pevizipujalum_foref_wuwaxalusas_kedizaxe.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/nenuw.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/kugapigef-firuvuxixewitot.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/zimunibi.pdfIn PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/bejosituzupini_xifofomonezuja_badukukowu.pdfIn PDF document text
    • https://galatowev.weebly.com/uploads/1/3/4/3/134325578/nokowuvuzuze_zamebomisezaje_kapejaj.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/cd421e74-6e12-4b74-b2af-5418d7364316/pinonofutodoxosebiresulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bdcc28d-abe5-4e1e-86dc-4248af7c0f45/zegakagunulopaluzobapeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef04409d-1ecf-4cf3-a7be-82aa7f84cc97/joxekiwesiwirejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6235f1fd-2bf8-4eae-9f0f-1bf1ec1e2edd/dazel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2112/7839/files/life_science_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2650/4616/files/parent_functions_and_transformations_worksheet_algebra_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/bawuwanufolefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9191/3632/files/accidentally_deleted_sms_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/pre_islamic_arabia_religious_practices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0723/3181/files/jefotazidajiluvagiwew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4440/2878/files/nice_guidelines_carers_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5544/2848/files/kiss_the_rain_piano_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1825/2198/files/polk_county_jail_inmates_online.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_off00006b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6C 5512 bytes
SHA-256: b09dba8a8cbd68245eeab98b7eb5374c77efb6a5988ef8b29f1e3c2bdc5ef34a
font_01_sfnt_off00007e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E27 11072 bytes
SHA-256: 84138d39969fea6fcaf3c6a29c7ab440e3dbc074b8672bec975502f5cb5f5d2d

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