Malicious PDF — malware analysis report

Static analysis result for SHA-256 8537e0b68001afd1…

MALICIOUS

PDF

52.9 KB Created: 2020-10-27 17:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cc1f30c5c8031052f83892944243fef3 SHA-1: db6accd2a708eec242271bc131f9583ded1c69da SHA-256: 8537e0b68001afd1549824165c72f11152f738489ab9809d9185dee02d7ceebb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/strik?keyword=in+cold+blood+meaning+in+hindi In PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/rixumal.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/7a7da10ec551a.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/ee27b50c64faae.pdfIn PDF document text
    • https://gefedotozowane.weebly.com/uploads/1/3/4/3/134395864/8676878.pdfIn PDF document text
    • https://mawoluji.weebly.com/uploads/1/3/4/2/134265904/jobafo-rubebasimeluv-xusiwaxa.pdfIn PDF document text
    • https://kizutinapetesod.weebly.com/uploads/1/3/4/4/134490845/ralugu.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/1315167.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/kugoxikukone.pdfIn PDF document text
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/xudifatoguledenobi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0087/5173/files/cooking_classes_columbus_ohio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9846/4152/files/63550266801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5255/6184/files/thuricide_bt_caterpillar_control_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/solicited_application_letter_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/45987893482.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/6061556618.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/82379764336.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/automotive_repair_workshop.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/generally_accepted_accounting_principles_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/mirezok.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/la_canzone_del_sole_spartito_pianoforte.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0e4f020-222c-41e5-b903-d7aee1528fb1/teoria_del_simio_acuatico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d994b3d1-2f27-4957-af5e-95331f6b4e8c/fijopawatapero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5452033-35a3-438f-961f-dc5a6c094856/gidezakub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b84d4eb-f1d8-4f6f-ac5d-c1a03627d978/tojimoreregef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecac339-6830-4eee-9e01-8bd8198fe8c5/20440735500.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCD 5156 bytes
SHA-256: 44433df41d3f2b385dcaa386ad878ad4777c52dd7b5d70d9173e89daadd0a966
font_01_sfnt_off00008d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D22 10188 bytes
SHA-256: 153d3ac0593324aacce3d6375b93cef777f7b7500d3d6e58ceedca8c21d44f31
font_02_sfnt_off0000b036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB036 16208 bytes
SHA-256: 560e11d5da3ed60647d844d0127c34f4fbbc0b68999cbe35161ddcd790341c9f