Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edd9a041e609de9…

MALICIOUS

PDF

85.1 KB Created: 2021-03-30 01:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8b79336c4abfcec4ea322fd68c9dcf30 SHA-1: ba2761fb2fde2644c8bec84857e1290313ef606d SHA-256: 5edd9a041e609de9c38420d14474f715ce05088de5e27586d18de0f59b81b62f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains numerous external links, with the primary ones pointing to `https://ponafet.ru/123?utm_term=binary+domain+pc` and `http://rerixen.scienceontheweb.net/ayushman_bharat_hospital_list_download.pdf`. The ClamAV detection `Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0` further supports its classification as malicious, likely a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/123?utm_term=binary+domain+pc PDF link annotation
    • http://rerixen.scienceontheweb.net/ayushman_bharat_hospital_list_download.pdfIn PDF document text
    • https://duguzimelape.weebly.com/uploads/1/3/4/6/134666192/1397951.pdfIn PDF document text
    • http://pilarivem.22web.org/nespresso_lattissima_capsules.pdfIn PDF document text
    • http://sebokuxaxugu.iblogger.org/33041945218.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/beats_solo_pro_over-ear_wireless_bluetooth_headphones.pdfIn PDF document text
    • https://pafuxasakilufa.weebly.com/uploads/1/3/5/3/135327400/wakevumosafet-kolorugabebon-mojiwuno-betuwilutevuna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vigavanoxe.onlinewebshop.net/omnisphere_2.6_library_size.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/nomazijibanotizate.pdfIn PDF document text
    • http://favirivesez.epizy.com/simewofug.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/how_to_do_momentum_physics_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/tazububudinopimakeb.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/14015830512.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/aplikasi_video_dari_twitter_di_android.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/uk_words_vs_american.pdfIn PDF document text
    • http://saxogif.epizy.com/elk_m1_software.pdfIn PDF document text
    • http://mevedokepovi.epizy.com/aines_2016.pdfIn PDF document text
    • http://zenerunikojovo.epizy.com/liftmaster_8165w_review.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/leaf_anatomy_coloring_worksheet_diagram.pdfIn PDF document text
    • http://zajoneforisomi.rf.gd/haldia_petrochemicals_annual_report_2017.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 3552 bytes
SHA-256: 3136f1d6390b24bdd810ae6c94fbd85aa1ffbe82272c8e78bbdebbb039ecf938
font_01_sfnt_off00010240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10240 4748 bytes
SHA-256: d03404fab79628a4ba3bfcbeb66c9b690166bc04c233b32d6953301d052eedb2
font_02_sfnt_off00011234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11234 11584 bytes
SHA-256: c36cc6b243445005715b7234c4a8c1b8f2fcfac15f7e80caa431eef89bf1ac63
font_03_sfnt_off000137c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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