Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab25f1fe68746ed6…

MALICIOUS

PDF

74.6 KB Created: 2021-01-11 13:33:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 53b443338fdb8584b3b8dcbc699600cb SHA-1: 2076f3d5e123ceac4bcc809bbf4fa8dc11222e41 SHA-256: ab25f1fe68746ed6fda56e489abc8639e41b9476fe1473a21e77a14b3b58d526
104 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL that likely leads to a malicious payload or phishing page, consistent with a phishing lure. The document body, though heavily obfuscated, suggests it is related to 'Breezing forms pro' and potentially an invoice or payment notification, aligning with the SE_INVOICE_LURE heuristic. No scripts were extracted, but the PDF structure itself likely facilitates the malicious action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffnew.ru/aws?utm_term=breezing+forms+pro PDF link annotation
    • https://cdn.sqhk.co/jaxabofapuw/biachim/xijiperogifekawokadaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409627/normal_5f9fc14963c1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446491/normal_5fc9ba9a7c52b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5fe79bb683c72.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/hjYxnib/aaron_jones_injury_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/gipudeviwapi/aDVgexb/19562491403.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472774/normal_5fcee96c87542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_5fb30af8c68d2.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/mawesenasijoser/lanipesavutebigixonu.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/43306884549.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/edema_agudo_pulmonar_gpc.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_off0000e89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 5076 bytes
SHA-256: 3e8bc43d16e943add1e2e2f5a2a396eebec1c26a8a35d24769a25086d9536f04
font_01_sfnt_off0000f9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E7 10556 bytes
SHA-256: adfb0d26f4f6e86d9ab6c56b0608fdc53f3f893af3c4bcf79ef518c986b3ca23