Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ef1f051882645a…

MALICIOUS

PDF

365.1 KB Authoring application: Skia/PDF m150 Google Docs Renderer First seen: 2026-05-25
MD5: acab71b20fdf10859affc8191282970c SHA-1: 3ac6597f702882b567cfa8101f06a8d6ca3f86ae SHA-256: d5ef1f051882645a96e4b220f234a2002149d3cc9bbb53c30597dc807aa4962f
80 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample exhibits characteristics of a callback phishing or tech-support scam, indicated by the high count of phone numbers and the 'SE_TRAVEL_SUPPORT_PHONE_SCAM' heuristic firing. The document body is heavily obfuscated and repetitive, likely to mask the embedded phone numbers and evade detection. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier clean score 0.0001

Heuristics 2

  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_017_off000350e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x350E1 152372 bytes
SHA-256: d318d2a115a834dda3dcb16f59a8bb9f5cd1fc20b9978d83ec403e4ac0d41269
stream_057_off00053fde.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53FDE 18240 bytes
SHA-256: 33e060654ed1208fc726f2323a8a9e7d9de6f6c8c2aedd340c7ed605b422fc95
font_01_sfnt_off0003fc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FC43 46476 bytes
SHA-256: 963541a4bab1fa95767f4b1cc4d2e2cd7d20c05ddb313efaa0269ae1285d4a35
font_02_sfnt_off0004417a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4417A 220516 bytes
SHA-256: cec36028ae522e8d02b169466447f3a01927c5e317ddacb9ca9faeed4bc9bd1c
font_03_sfnt_off00055378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55378 11904 bytes
SHA-256: 4728ae33b4501f858c8fd696f815180d77d260b89e3708fe66eb27a0220ad52d
font_04_sfnt_off00055c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C19 129692 bytes
SHA-256: f0c526424d74b23614c32984cadae458d7ed89f466a6abe79aca0f2ebc2cfb2e
font_05_sfnt_off00057749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57749 68100 bytes
SHA-256: 9b03ddf5b10dd7db4b8bc7c6fa30ffa1127828ed7b307f173085ae5142df297f

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