Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a2f55d7d29f21f…

MALICIOUS

PDF

72.2 KB Created: 2020-11-11 06:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9112f4236a80127f51541a71600dbdb SHA-1: 1ed7558b02a6458c9bbd73fd87aad1c0bed2090e SHA-256: 45a2f55d7d29f21f4d6724bab96c387260a0ba77bae9ef7a3b5377fb7f457334
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely to redirect users to malicious or scam websites. The presence of embedded URLs further supports this, with one prominent URL being https://traffking.ru/123?keyword=ez+server+p99.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?keyword=ez+server+p99
    • https://cdn-cms.f-static.net/uploads/4388169/normal_5f9b67d15f308.pdf
    • https://cdn-cms.f-static.net/uploads/4460725/normal_5fab111ec210b.pdf
    • https://cdn-cms.f-static.net/uploads/4416659/normal_5f953bbabb4d6.pdf
    • https://cdn-cms.f-static.net/uploads/4376105/normal_5f8cf79cac1e3.pdf
    • https://cdn-cms.f-static.net/uploads/4383340/normal_5faa510d33e4f.pdf
    • https://cdn-cms.f-static.net/uploads/4419644/normal_5fa1a6f2e77cc.pdf
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5fa89a9fafd6d.pdf
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5fa51adda316b.pdf
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/milinafoposapuze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/07ae5e3a-c944-48d7-a81b-1fb02b7d72a7/sports_head_soccer_2014_world_cup_unblocked.pdf
    • https://uploads.strikinglycdn.com/files/3963adf8-00df-47f6-9b54-433b85b8c052/64529089018.pdf
    • https://s3.amazonaws.com/rozebofukixus/71498445316.pdf
    • https://uploads.strikinglycdn.com/files/21d12b52-b7ce-45bf-90a6-9ade64fcb2e8/foxit_advanced_editor.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd09.bin
08703f057aff4540f8cffb589b8bf16940b0e81e5097bc33ae84d1696e6674c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 4796 bytes
font_01_sfnt_off0000ed7a.bin
04df28ff54825bcde7622afb4f57812ab13d84d91163172335b6959a96fb4efd
pdf-font-stream PDF embedded font (sfnt) at offset 0xED7A 11948 bytes