Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ecfdb00e08c899…

MALICIOUS

PDF

71.2 KB Created: 2021-01-02 14:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fc057b42935480a3981da3cf11d15539 SHA-1: fd8baadd01a2288334bcb365b4c20c8ba4272214 SHA-256: c7ecfdb00e08c89949a09deaf2a013728f9b57ee05363785a37f2262a2bdefd4
214 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including a high number of embedded links pointing to external resources, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure itself is weaponized to lure users to potentially harmful sites.

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
  • 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://traffine.ru/aws?utm_term=silent+sanctuary+songs++free In PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/e6471d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476947/normal_5fe7df640262b.pdfIn PDF document text
    • https://rirulejirosajis.weebly.com/uploads/1/3/4/3/134320684/jakujob_tipisejavasaluw_sevadudag_kaduzobo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5fed985f78656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447626/normal_5fd6fcab87562.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
    • https://uploads.strikinglycdn.com/files/83af2a5e-1be2-49b5-b292-1fb86e1ea617/minecraft_story_mode_season_3_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/haydn_biography_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/biromoduku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4dcadca-2d00-40eb-9da8-a4f1e3ea793f/xolaluluxudupav.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/stardew_valley_foraging_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4187cd-57ea-45fc-8e1f-8942e0cf043e/bird_box_trailer_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1f9acf-ea93-4706-8c67-1bf9ad848c1c/45975091646.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/24173140760.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/student_progress_report_card_comments.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/south_america_political_map.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD0 5136 bytes
SHA-256: 359552986077dd03487ccf29920e1c933bad8dd3a35abb9a29d573c9025b0e71
font_01_sfnt_off0000dc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC51 10996 bytes
SHA-256: 70ad1199b42fd391b7d4b1b8bf9e701a68be88bdffae08f86ab0587d1a4d5dd1
font_02_sfnt_off000101e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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