Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e5907f93ef70e6…

MALICIOUS

PDF

93.6 KB Created: 2020-10-27 09:01:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 562fee4e7c33b063ad5e934d0104f565 SHA-1: 643bc04abf92153d7706caa9c4f3971b475fcb70 SHA-256: d1e5907f93ef70e61638cb16f524df294c660e57141df1e3dd589c218095105c
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to research paper titles, aiming to trick users into clicking the malicious link. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/wb?keyword=contoh%20judul%20pkm%20penelitian%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415937/normal_5f950d6eeed1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5f920dfec3302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f8a95430d9b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_5f93ed43285ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5f8d6351b5a00.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/8f4ab026-7f1c-4b20-bf64-90045c7bbba5/konul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4119c7-c497-4053-a6e4-242154a98a91/72409968670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f0fe2c-691d-49e5-b860-0dbdad33240f/tipobegejumuxemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bdb2cc3-2263-4b15-83a2-3323f2b63f1e/juxovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/2565/0592/files/metuvisegoxigat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/1737/2565/files/slick_web_camera_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2589/9426/files/samsung_s7_edge_android_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9107/6269/files/57117554349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6466/6533/files/89833345537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1593/7441/files/hechizos_de_harry_potter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8373/4431/files/vusuxazagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/1682/7292/files/2020_honda_pilot_lx_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a5b177-ad7e-4403-9fd4-5293a184c141/roxio_hard_drive_watcher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00692923-e778-4779-998a-716bab08ce9a/58307682178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87f1fb2-ac0c-4410-9616-f5915ff5efd2/training_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621c64aa-fcfe-4942-87f0-01c578e46a9c/apuntes_historia_de_espaa_2_bachillerato_madrid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7590e90e-7540-4852-a93e-44123b48dbeb/ralolurepunidamiv.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_off00012371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12371 5052 bytes
SHA-256: 73aaa5dac519de0d33436339e1b710334760b42612e97eeaeced3a5fa4494db2
font_01_sfnt_off00013481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13481 11684 bytes
SHA-256: 56a4baab1b80d4cf3bd7c7160f06b8eac5d6f2837a818e8d28e735fdb341de76
font_02_sfnt_off00015a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A8F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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