Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e19ea07b49963c9…

MALICIOUS

PDF

76.8 KB Created: 2021-03-24 01:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d28f89b2449c34043c7643d06d768aa9 SHA-1: 28df74cd976d761eb478952046c924219b737c91 SHA-256: 5e19ea07b49963c9fcc7eec65ca5fc3dc99e644bce1731866e843719ffcf5189
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a suspicious domain, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are likely intended to direct users to malicious content. Although no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of malicious intent, likely to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://maypoin.ru/strik?utm_term=monster+school+2020+movie+poster
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/guvod-jelinonela-jotaruxerodafab-dupabewep.pdf
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/benureniwewikuro.pdf
    • https://daxexamuve.weebly.com/uploads/1/3/4/4/134446800/kutusi.pdf
    • https://static.s123-cdn-static.com/uploads/4454990/normal_60090d88d7ef1.pdf
    • http://tetizeniwa.mypressonline.com/bharat_ratna_award_winner_list.pdf
    • https://cdn-cms.f-static.net/uploads/4453743/normal_600f75c5067ff.pdf
    • http://mojenisijita.mywebcommunity.org/gexidulif.pdf
    • http://fesotisifofil.mygamesonline.org/technical_file_example.pdf
    • http://galosidijixiwu.mypressonline.com/what_is_considered_direct_democracy_government.pdf
    • http://vizazovabula.mywebcommunity.org/88580635854.pdf
    • https://cdn-cms.f-static.net/uploads/4368740/normal_604fe4e45cf0e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jedaxopopuko/47600167482.pdf
    • https://s3.amazonaws.com/dexodekelaseki/present_simple_tense_exercises_worksheets.pdf
    • https://s3.amazonaws.com/firigugixujotov/nightmare_before_christmas_soundtrack_revisited.pdf
    • https://s3.amazonaws.com/lakadutof/gw2_weaponsmith_guide_0-_400_cheap.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/83614453462.pdf
    • https://s3.amazonaws.com/rovikibixu/95016806386.pdf
    • https://s3.amazonaws.com/kudufigunabi/65694349342.pdf
    • https://s3.amazonaws.com/pavujiniz/aliens_1986_movie.pdf
    • https://s3.amazonaws.com/lorifumofelu/hd_bhavani_mata_image.pdf
    • https://s3.amazonaws.com/fomudebipefasu/93409086720.pdf
    • https://s3.amazonaws.com/bevarolimesale/kubuzoxesutexataguwo.pdf
    • 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_off0000ee4b.bin
5bd8210f89b4318841b3a61914c972ac4bd54a092873dbcf377f538f42c14501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 5304 bytes
font_01_sfnt_off00010041.bin
bcd6fcce74f82aae4edec0692849dad214ff44988e6e4497630e2da32c039e65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 10456 bytes

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