Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae38680c02a8561e…

MALICIOUS

PDF

81.3 KB Created: 2021-06-04 19:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95b1e32748e153246ded2d49ca701603 SHA-1: 8416f5904f120444db7d4be6eee91ca3879fd21d SHA-256: ae38680c02a8561e50aeca431c1321ecc46da732ac6a6c363e366b640bff386e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by both heuristics and ClamAV as malicious. The ML classifier also strongly flagged this PDF. The presence of the URL and the nature of the heuristics suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://inwebjor.ru/pbw?utm_term=libros+de+autoestima+pdf+gratis
    • https://cdn-cms.f-static.net/uploads/4383806/normal_60473c0a6da27.pdf
    • https://cdn-cms.f-static.net/uploads/4368758/normal_60b9b7bd018bd.pdf
    • https://cdn-cms.f-static.net/uploads/4425214/normal_6055cb171fa84.pdf
    • https://cdn-cms.f-static.net/uploads/4448547/normal_605f35dbd65ec.pdf
    • https://cdn-cms.f-static.net/uploads/4387037/normal_6065fa1d8cc88.pdf
    • https://static.s123-cdn-static.com/uploads/4449769/normal_5fc7fff01d678.pdf
    • https://cdn-cms.f-static.net/uploads/4417659/normal_604b62890d6bb.pdf
    • https://cdn-cms.f-static.net/uploads/4366043/normal_600f87715cf80.pdf
    • https://cdn-cms.f-static.net/uploads/4455642/normal_60651c96c5070.pdf
    • https://cdn-cms.f-static.net/uploads/4446765/normal_60491585d7461.pdf
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5fe2856445431.pdf
    • https://static.s123-cdn-static.com/uploads/4446260/normal_60008d6d9b6f8.pdf
    • https://static.s123-cdn-static.com/uploads/4489716/normal_5feb5f8a8373d.pdf
    • https://cdn-cms.f-static.net/uploads/4474449/normal_604fbee719f13.pdf
    • https://cdn-cms.f-static.net/uploads/4409609/normal_606603b53b14c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7478f69d-7448-4f25-97a6-85de7df916f1/power_rangers_full_movie_in_hindi_free_download_filmyzilla.pdf
    • https://uploads.strikinglycdn.com/files/13fc03a6-b2e3-446e-9816-aa18be3f99c2/2007_maserati_quattroporte_0-60_time.pdf
    • https://uploads.strikinglycdn.com/files/1b8634fd-4d87-4ba0-9241-0239b3b57181/22375504320.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_off0000fd52.bin
19bc3b8a4caaac232d9527c1c2dcc72c15552442d5808e18556867fce792dbea
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 5408 bytes
font_01_sfnt_off00010f9f.bin
68901e69195c606a0db51241b3d35b47aaed8e101980d8a92192ee73e3fd87cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9F 13460 bytes