Malicious PDF — malware analysis report

Static analysis result for SHA-256 1490c09e1f3ff803…

MALICIOUS

PDF

90.1 KB Created: 2021-04-06 21:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d03ea518cefaf8e2e781c53f7c4f466b SHA-1: 83500b089662dea1c1813724cdfe04ae29d8a045 SHA-256: 1490c09e1f3ff803d9e0fb8988588c7e717862f744674992fdd180547601d268
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://fokemale.ru/wix?keyword=pathfinder+oracle+archetypes+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366369/normal_6012278417b4a.pdfIn PDF document text
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/7199870.pdfIn PDF document text
    • http://pizozajo.iblogger.org/22565388251.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473403/normal_60026fa3aed25.pdfIn PDF document text
    • http://davofaso.22web.org/kafefuropetoxerigipudifod.pdfIn PDF document text
    • https://gawugabel.weebly.com/uploads/1/3/4/3/134361726/800840673f1258.pdfIn PDF document text
    • http://barakerefexile.iblogger.org/2020_year_calendar_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482863/normal_5fc78b43abe14.pdfIn PDF document text
    • https://lubuvaludufaf.weebly.com/uploads/1/3/5/9/135981644/3886630.pdfIn PDF document text
    • https://vuvoxuwamulixa.weebly.com/uploads/1/3/0/7/130739220/sozeramis-rulom-kenidis-gemin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383913/normal_60611b3777d66.pdfIn PDF document text
    • https://dozogifelezu.weebly.com/uploads/1/3/4/3/134313369/gelujoxopumejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_60343018e0aae.pdfIn PDF document text
    • https://telidububiz.weebly.com/uploads/1/3/1/4/131452987/tiwagegutazufizomom.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/vidadaviwal/54252554496.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/antidiabetic_activity_of_tinospora_cordifolia.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_off00012138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12138 5520 bytes
SHA-256: d1778a25bbb54e3f98e12cae6ccd182c552b5d64ccd1dd55fdb410a3d0a495ba
font_01_sfnt_off00013406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13406 11488 bytes
SHA-256: c2e3f518f1706b7a836e56c6fb7ff651ba6c043afdeac1d4f07ab2bd97ef95bf