Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b5ec7fa7fb7444…

MALICIOUS

PDF

78.4 KB Created: 2021-03-01 18:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1a140ef900747e87df553d901d4509a3 SHA-1: 383da0c7cddb87aa58f867dc23ea01f5d9305918 SHA-256: d0b5ec7fa7fb744473ef85f2ab10753940eefa3b999e17cf07d67280d5e8d7be
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated, indicating a link farm or SEO abuse tactic. ClamAV and ML classifiers strongly indicate maliciousness, specifically a phishing or trojan payload. The embedded URLs suggest the document is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=rca+voyager+3+manual PDF link annotation
    • https://lovelutunaguj.weebly.com/uploads/1/3/4/7/134735325/rusaluwoza_gajevuje_vesawuposab_kajivikatuw.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/demonstrative_adjectives_worksheets_4th_grade.pdfIn PDF document text
    • https://fomememuvur.weebly.com/uploads/1/3/4/0/134000402/xuwawenajotunelubem.pdfIn PDF document text
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/6673948.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/74207452943.pdfIn PDF document text
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/5076992.pdfIn PDF document text
    • https://zolotamazuragif.weebly.com/uploads/1/3/2/7/132712333/naruke_mipubegepiwuxe_xawepepuwebigex_wuripevi.pdfIn PDF document text
    • https://jewesorovusupim.weebly.com/uploads/1/3/6/0/136092124/7d08606cabb2.pdfIn PDF document text
    • http://leledup.mypressonline.com/weight_loss_chart_printable.pdfIn PDF document text
    • https://mulexiti.weebly.com/uploads/1/3/1/0/131070330/susifedim_gojosutojadi_lowuze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuxikujare.epizy.com/tijimixafonafobi.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/61843271514.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/vugasepejax.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/cc_catch_all_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/53345829142.pdfIn PDF document text
    • http://gelutosedufom.epizy.com/sarah_dessen_books_netflix.pdfIn PDF document text
    • http://golomaje.rf.gd/used_wheel_horse_tractors_for_sale_in_pa.pdfIn PDF document text
    • http://vodobugatusexa.epizy.com/amicron_faktura_8._5.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_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 5272 bytes
SHA-256: 6977fd7d89dba346db8e4b8572b14b431aacda76c54edc639e64ce734d77c792
font_01_sfnt_off000108f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F0 10564 bytes
SHA-256: c9b69e6cef7b3361aa1c7284109a4de2764bc38ab5bee156469e081fb246181b

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