Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77bd0f2f561ad05…

MALICIOUS

PDF

48.1 KB Created: 2020-11-06 15:09:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0a9321ce4865540f12ce9898cbe3bb45 SHA-1: 9cd2c7ab0641626dbfa5e632ccd86173ca8f0a88 SHA-256: a77bd0f2f561ad0591271e6c492ebe63c43f917ab3ce6d84d33b70849e2da377
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file 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 3

  • 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.
  • 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://traffmen.ru/strik?keyword=fruity+loops+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_5f97fa111a51d.pdfIn PDF document text
    • https://dopozigixojak.weebly.com/uploads/1/3/4/5/134509916/ff38464d3765f24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383156/normal_5f8eade6a4e22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f8e39ee1dac2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/mimifutifozuvolulasogesu.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/a_tiger_in_the_zoo.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/ds2_sotfs_master_of_hexes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8411618d-8089-4c23-a352-e214d45374b4/vukuvozanekapix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033f2910-d17a-4725-9ed7-84ba461f32ca/dnd_5e_longbow_proficiency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee8aef7-cd70-4cf8-bb09-a025112706fc/vedizerifa.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/zupobegekupexetebilibe.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/91748532714.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/mech-dowels_big_mech_icy_veins.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_off000071cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CF 5244 bytes
SHA-256: 0b7029a0dcdc22bc7b2172bc2d98702427985fb25be819d91ffbce7ab8bf16f1
font_01_sfnt_off00008396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8396 15184 bytes
SHA-256: 8f5c07ab3eda0953e7a9233fe1d7a742488beae69cb25beefde4d85dbe71b7db