Malicious PDF — malware analysis report

Static analysis result for SHA-256 0125d4828e8137af…

MALICIOUS

PDF

74.5 KB Created: 2020-11-14 07:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9f786eb8f4e8fab7fe796da8abc84256 SHA-1: dda9f702e2ff888f22fabeb4678cec6fde62e046 SHA-256: 0125d4828e8137af8d6c4c1296b6fb17e2464488a1609a922c2c014fb2c750c2
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=apkhere+nostalgia+nes+pro In PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/dajadotavuratipuku.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/8a6431d4-f497-4fee-99cf-b10080f6ed95/aquolina_pink_sugar_lotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881b5f6b-d209-47cf-954f-00324d21051f/gymnastics_games_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01fb9a00-9568-491e-9fc6-7621a90414d2/30431135470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49da72a0-ddc6-4cc0-9d7e-485386597dc5/savulukoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891e0f7b-75dd-46c1-b388-14a203fabd6b/18206522208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80505fb2-758b-4490-9988-d34fd9311d40/95590576857.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/main_causes_of_poverty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51345942-a2a2-4e80-8236-5875704889e9/nebetumevenorunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab89260-83b2-42ca-9016-4fae855c1823/29495891348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7841c40e-512c-4bc8-b192-b37a7dc1339e/tefijosozivajafisotax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/021da035-f98e-4bf1-b1d7-d340cf4545be/intro_to_marketing_final_exam_study.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9450a98-e810-4f49-aa61-58cf37ae524b/si_beag_si_mor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56bd6965-d931-4dc0-a504-e464552973e3/rudilek.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B9 4924 bytes
SHA-256: 97bfae59310e461e156f3ffd6915408ab3e592b22a327b0c42ff2079a1684e5c
font_01_sfnt_off0000e964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 10952 bytes
SHA-256: 5ce3c9f57d5813edfd7a1d903c673072aeb3745c2a71dcba8010d09170b598c5
font_02_sfnt_off00010ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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