Malicious PDF — malware analysis report

Static analysis result for SHA-256 2804b98eebf3741a…

MALICIOUS

PDF

81.9 KB Created: 2021-02-16 23:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6d1eaa35470006c52f338efef46f8bd6 SHA-1: da80d68b077b9a0536c5b15405b59e1e28c5a01d SHA-256: 2804b98eebf3741aacd8f67484e85e5a4fa498df2513b08671c1c08b582bcf2f
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a tactic to manipulate search engine results or to host phishing lures. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely related to phishing or SEO spam.

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
  • 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://yafferge.ru/wix?keyword=watch+chicago+fire+season+2+episode+9+online+free In PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/bawapaw_kuxupig.pdfIn PDF document text
    • https://vesovagesigopek.weebly.com/uploads/1/3/4/6/134614223/mimosof.pdfIn PDF document text
    • https://pavibizad.weebly.com/uploads/1/3/0/7/130740264/vurisit-dogupuboxadifib-timowowevaloduz-wiwufiz.pdfIn PDF document text
    • https://fijomenameti.weebly.com/uploads/1/3/0/8/130874411/597a8.pdfIn PDF document text
    • http://nilofebep.iblogger.org/antietam_licensed_battlefield_guides.pdfIn PDF document text
    • https://xuzabuteke.weebly.com/uploads/1/3/1/3/131379980/9728505.pdfIn PDF document text
    • https://wilivaja.weebly.com/uploads/1/3/2/6/132682565/d0e5199.pdfIn PDF document text
    • http://tuwedoviwe.iblogger.org/nathaniel_bassey_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fusivud.epizy.com/army_aviation_accident_reports.pdfIn PDF document text
    • http://jilutuve.rf.gd/beyblade_burst_mod_apk_happymod.pdfIn PDF document text
    • http://jagazuzigi.epizy.com/3775568989.pdfIn PDF document text
    • http://wezexezawudev.rf.gd/common_core_math_sheets_fraction_word_problems.pdfIn PDF document text
    • http://xozujojunesu.epizy.com/kuxizufikefes.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/losamokubitew.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/b_m_b_full_form.pdfIn PDF document text
    • http://gukisika.rf.gd/dunodapezedodorureki.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/daponikekudubepuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/idrudgereport._com_iphone_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/whatsapp_business_plus_mod_apk.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_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 5720 bytes
SHA-256: a6af24655641fcc5edaa0b30ca44a72061967bfd2f89b16359ed1bab6a1bdf42
font_01_sfnt_off00011445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11445 11120 bytes
SHA-256: c9ac392261405405ad877fc5c931e50edeb6e4dca30cd28077f65f5736d91ac2

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