Malicious PDF — malware analysis report

Static analysis result for SHA-256 e013e1d483560e63…

MALICIOUS

PDF

110.3 KB Created: 2021-04-02 15:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 008268cc9e9e49bf9522bbf71009e5bb SHA-1: 7a356605cb396ccde32dd5b8378c25e09c4b865d SHA-256: e013e1d483560e63c14d274788bc317f259c5b68968a4fa7d8c10828c50f46e7
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and phishing lures, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'SE_INVOICE_LURE' heuristic suggests a financial pretext. While no scripts were directly extracted, the presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious content, likely a phishing page or a further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://seumenha.ru/wix?keyword=financial+support+letter+for+tourist+visa
    • https://luxovifawus.weebly.com/uploads/1/3/4/3/134341193/5421491.pdf
    • https://nugatifijomit.weebly.com/uploads/1/3/4/7/134715362/f2d8e39.pdf
    • http://tuvosudokalidu.scienceontheweb.net/16594592931.pdf
    • http://dekiweragaf.mywebcommunity.org/kawavu.pdf
    • http://lorubuxetorifa.medianewsonline.com/kosirufebumokajubitet.pdf
    • http://vepenuvix.mygamesonline.org/2005_honda_accord_maintenance_light_will_not_reset.pdf
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/ropem.pdf
    • http://zutolewe.mywebcommunity.org/what_did_they_use_to_treat_the_spanish_flu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dujoserowumil.epizy.com/99336822331.pdf
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_c5355a7e2fff470897eb0494c4d8738b.pdf?index=true
    • http://wosimudekefa.rf.gd/metformin_for_pcos_babycenter.pdf
    • http://xuvekixofeku.onlinewebshop.net/amway_artistry_products.pdf
    • https://320f262d-053d-461a-9009-498fa3b044f5.filesusr.com/ugd/8e680a_5f283c0a0eb940d9b71d3f4efa40e534.pdf?index=true
    • http://bixozebaxikapos.atwebpages.com/pegokiwemazubili.pdf
    • http://wolobugoxew.myartsonline.com/android_secret_codes.pdf
    • http://galexuduxegi.epizy.com/automotive_air_conditioning_and_climate_control_systems_download.pdf
    • http://sewemira.atwebpages.com/argentina_economic_crisis.pdf
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_6dda03b149c54fc89974600f7534ab22.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000170d8.bin
0f1cc9c30710d3623ea63c9171309ecd3c20824412a9eaf96915bfb1eab6a310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x170D8 5024 bytes
font_01_sfnt_off0001820b.bin
4c3cc458ea35c4b6e6b0761d6df3e51df03d30e670d3fc5e0f5af078dcbc16cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1820B 11808 bytes

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