Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceeb4bd825c26c00…

MALICIOUS

PDF

80.3 KB Created: 2021-04-12 22:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: eda787f0860f4303773f238af1824a21 SHA-1: 21a299d0d61a5efc3a81bf8064cb13fb993678e6 SHA-256: ceeb4bd825c26c00e1859254b314201f6a39eb87eeb3a09bfbdb6c102a3dfa8c
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a known malicious redirector domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded links are designed to appear as legitimate PDF documents but lead to malicious infrastructure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=data+analyst+technical+skill+set In PDF document text
    • https://zozumaled.weebly.com/uploads/1/3/1/3/131379894/2212826.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/9575017.pdfIn PDF document text
    • https://sazuwigigaxav.weebly.com/uploads/1/3/1/4/131407293/sibexalamekuditup.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/aafd9ac6c98.pdfIn PDF document text
    • https://gawokani.weebly.com/uploads/1/3/5/9/135993895/3656255.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/51300393-4705-4437-8a62-8058a06b3907/how_much_does_an_average_car_mechanic_make_a_year.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/wubesidizugoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f3ef88-43b5-4b6f-974a-605913c3ca0c/84_charing_cross_road_movie_streaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f8a157-ed9b-467f-8d95-60bfd709c320/why_is_my_washer_not_draining_and_spinning.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/hp_envy_4500_printer_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/car_mechanic_shops_hiring_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/html_inline_style_link_color.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/milezajejunup.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/milivoxud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2234b9-2098-4ae0-ae91-198ea8804b3f/how_to_sign_up_for_army_combatives.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/isolating_relevant_costs_is_desirable_because.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/sotaxopozitutebedo.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/adanga_maru_movie_bgm_in_masstamilan.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/blank_t_shirt_template_psd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f4991b2-ab28-4b3e-adb6-dfc057f8c151/how_do_you_calculate_the_average_density_of_the_earth.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/78688470794.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/taliw.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_off0000fce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE0 4956 bytes
SHA-256: d1f7c1571b3183698a71004d0f47202211f1a02274d6d3e0d7630af4d0c6691c
font_01_sfnt_off00010dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCB 10672 bytes
SHA-256: 29ed5a47d199f0e5f533e4267ffb62482c756ac35ce1699dd92205ac5d714793

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