Malicious PDF — malware analysis report

Static analysis result for SHA-256 06436c371ae163b3…

MALICIOUS

PDF

84.3 KB Created: 2021-03-20 21:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a78b08312c376546ef393766917b8823 SHA-1: 109be1e7b68e1a88e30e0c5a36461c1f75e29cb1 SHA-256: 06436c371ae163b3693a14849abd4edffba326c50c9083b3af99d738d1f3d5e1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://resalured.ru/wix?keyword=the+busy+coder%2527s+guide+to+android+development+pdf+2019 PDF link annotation
    • https://paninopuj.weebly.com/uploads/1/3/0/7/130739529/c34694cc5c.pdfIn PDF document text
    • https://lobodilogiji.weebly.com/uploads/1/3/1/3/131382226/kojuxokawapewikapi.pdfIn PDF document text
    • http://labebatazavanoz.mygamesonline.org/lipid_metabolism_summary.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/trumpet_voluntary_stanley_organ.pdfIn PDF document text
    • https://jeredesuju.weebly.com/uploads/1/3/4/4/134432205/3486407.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/how_to_build_a_website_from_scratch_wordpress.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480580/normal_5fe4eaf82f4e1.pdfIn PDF document text
    • https://nutuvujupakumap.weebly.com/uploads/1/3/2/7/132740288/pokenivopavufuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404488/normal_5fd125c013e2c.pdfIn PDF document text
    • https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/kupuwaz.pdfIn PDF document text
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/tisidelosexu.pdfIn PDF document text
    • http://xunopapazugatar.medianewsonline.com/loxizat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jixabedumusuzet.rf.gd/macbook_cheat_sheet_app.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_e04434e63aeb4deb83909a3db23b8ca7.pdf?index=trueIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_0b813c981d2d44588ef6ca9a709168c2.pdf?index=trueIn PDF document text
    • http://vugapadilubokis.epizy.com/91371288877.pdfIn PDF document text
    • http://tixogakimu.epizy.com/statistical_model_validation_techniques.pdfIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_358ebf616aed48058989366e9db9adc8.pdf?index=trueIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_746ff92ffa6b473f94b2d40a9749e367.pdf?index=trueIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_24b33bfeb4b0498b9282c2cb02ea43d5.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_off0001061b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061B 6336 bytes
SHA-256: 21d79e2230a44dc3cde45c94eda0ff2f1189d6bab8f9e6c76cc1b77a8a30af77
font_01_sfnt_off00011b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B93 11756 bytes
SHA-256: 7c57f946b7da965ff37539ad83766b9a325b06c8af0b1cf228ec5bd927bc6579

Open this report in the interactive analyzer, or submit your own file for analysis.