Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef7a67fd1c8e982…

MALICIOUS

PDF

90.0 KB Created: 2021-03-17 19:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8e75d39ce0cdc784e05b4848c35582f7 SHA-1: 4e6e75adeb8f0318bdebeadae3f4187e51cd73f0 SHA-256: 5ef7a67fd1c8e9824da836eb529b42715ebe0d97b95f7cca3ead6fbd58b9e7e5
206 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to 'bail bonds manhattan beach' and metadata indicating it was generated by wkhtmltopdf, which can be used to create malicious PDFs. The presence of numerous external links indicates an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://jumiwimov.ru/wix?keyword=bail+bonds+manhattan+beach PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369149/normal_6040c19e50b29.pdfIn PDF document text
    • http://dozokite.22web.org/word_families_activities_for_2nd_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_603bd1edc8478.pdfIn PDF document text
    • https://megogira.weebly.com/uploads/1/3/4/5/134590171/2990446.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374710/normal_5fcc8af5f41f8.pdfIn PDF document text
    • https://nipawivas.weebly.com/uploads/1/3/2/6/132680981/woxerizaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402280/normal_603454cdbdc87.pdfIn PDF document text
    • https://fujubonutebi.weebly.com/uploads/1/3/4/2/134266124/9400205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_604edeb644e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_603bdf7cce0a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385863/normal_5fe0dec8b11ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_6013b3852c414.pdfIn PDF document text
    • https://tazowodogakog.weebly.com/uploads/1/3/1/4/131437711/b06837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484624/normal_600304d44cb3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_6038792f2e946.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fe041f6c40cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_907ee260d9874b3facc44eff1b2f06be.pdf?index=trueIn PDF document text
    • http://fasemejatafa.rf.gd/tunagoxatekuvepumuxexovu.pdfIn PDF document text
    • http://nowuzapifara.rf.gd/chambal_ki_kasam_movie_songs.pdfIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_2beee6f518754e25a5d02577cc02bc27.pdf?index=trueIn 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_off000123f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F9 5272 bytes
SHA-256: 02901e17779457a3d188b57bd891b3e1ada10dfda2c24299e53ded814f122f79
font_01_sfnt_off000135bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BB 10832 bytes
SHA-256: d3884016ecff1191298c4cf3dea125413d889a77fbfabc390e00f72bc55fdf98