Malicious PDF — malware analysis report

Static analysis result for SHA-256 58798aee05cebb08…

MALICIOUS

PDF

78.7 KB Created: 2021-04-19 23:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2e9826f2ae60740cb008617184c8530e SHA-1: b8f8ef42396801fee4852fae488225c66bacd274 SHA-256: 58798aee05cebb08a780ca9966cb5c108f7bd19b50320f7ce21b653033e32d85
156 Risk Score

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 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
  • 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.
  • 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://gimoguvi.ru/strik?utm_term=how+to+reset+a+whirlpool+clothes+washer PDF link annotation
    • http://xuwuvewisin.mypressonline.com/pivezema.pdfIn PDF document text
    • http://nebuxopav.mypressonline.com/31941570328.pdfIn PDF document text
    • http://zomolejefej.mywebcommunity.org/piwumakiwikofimob.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/6f2ae9d.pdfIn PDF document text
    • https://dopakegufa.weebly.com/uploads/1/3/1/3/131384718/tomaxoja.pdfIn PDF document text
    • http://lebofawudire.mygamesonline.org/lapufixirotefetirasuwaxu.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/what_did_the_second_great_awakening_emphasize.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/aura_libro.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/awei_a885bl_manual.pdfIn PDF document text
    • http://tekupugu.sportsontheweb.net/define_neoliberalism.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/alphabetical_order_and_miscellaneous_series.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/59320151575.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/mafebesato.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/documentation_jasper_report.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/7124173607.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/rumifiniziz.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/antidiabetic_medications.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/bodyguard_hollywood_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/story_of_an_hour_online.pdfIn PDF document text
    • http://sanugifop.atwebpages.com/gofobirebenemobilusipi.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 5076 bytes
SHA-256: 351ee9b85d6e414a32dac41063f057db7bf71b578d8cbfcb40d005cb6e28fcec
font_01_sfnt_off0000f892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 6068 bytes
SHA-256: cb159cc9d714520fdf604515834a8e5d6ccdf81551317d8133b939af7313f940
font_02_sfnt_off00010842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10842 10800 bytes
SHA-256: 7fad6e93f01d18bb23349e3009da15a6836d691b101076863c29aecd71023122

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