Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf015104aadff04…

MALICIOUS

PDF

77.6 KB Created: 2021-02-26 06:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 28a438f35c260284247f719517d4c885 SHA-1: d057d4c8c335ab63cc4867c264cd0ba38b83d374 SHA-256: 1cf015104aadff04c5a6a530d81e4038a76e5b40a07a772a73c41209f3b72738
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://crophysi.ru/strik?utm_term=john+deere+intek+ohv+7.0+190cc+carburetor PDF link annotation
    • http://ericksandoval.com/207058105786oeha.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/8096958.pdfIn PDF document text
    • http://noriwisisun.iblogger.org/fmla_certification_forms_in_spanish.pdfIn PDF document text
    • https://firulasimasib.weebly.com/uploads/1/3/0/9/130969438/lurep-salasixesula-tegiweromorijo-duvosenujenex.pdfIn PDF document text
    • https://woniwisupu.weebly.com/uploads/1/3/4/2/134266019/193745.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/0hbhZhc/biwalapizowibidaje.pdfIn PDF document text
    • https://vumamoxaku.weebly.com/uploads/1/3/1/3/131380777/1344603.pdfIn PDF document text
    • http://lnstagram-helping.live/rusiwerigush6et.pdfIn PDF document text
    • https://bukalejobiwasek.weebly.com/uploads/1/3/1/4/131409200/rivepofefuwiwebe.pdfIn PDF document text
    • https://pujatimosu.weebly.com/uploads/1/3/2/6/132681823/8824649.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jenepopavuse.epizy.com/muwulijitavutoxerova.pdfIn PDF document text
    • http://xodamekexu.epizy.com/diwogirokewuxenolanasik.pdfIn PDF document text
    • http://garapaf.epizy.com/38711412164.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF214 5532 bytes
SHA-256: 1a3948d215edfe3d5cfea95378e74e1e34e1c8bcdeda97ff476418b02d451c4b
font_01_sfnt_off000104ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EC 10744 bytes
SHA-256: 0e369d5286c04b06832adeab41ff8b98263bcdce8eba82ef0573b11067d018df

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