Malicious PDF — malware analysis report

Static analysis result for SHA-256 5344feda10ae5f8a…

MALICIOUS

PDF

67.0 KB Created: 2020-11-18 05:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4c4f0c0f3d8b969c1c5b0ac59d8e9fae SHA-1: d81149308959a52ee2faa0a07b80c58bc2abbe2e SHA-256: 5344feda10ae5f8a59ece84dde8bd83d01650e203809958cb22ab60edca8547e
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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) documents that carry no urgency or charge/dispute escalation.
  • 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://trafffi.ru/123?utm_term=galveston+county+jail+phone+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393358/normal_5f951ce48cc36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426087/normal_5f9cbf8957dea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f95eb8cc9ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5fa7329ba39c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f879ccb0a89c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_5fa7263f2aae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_5f9129f98aa8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8fc1ab3d-ab05-4a71-a77d-d3e5b30309e1/asrock_990fx_extreme_3_sound_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/27472578145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc79736c-2dad-4775-8783-d22f35a4e22d/59127402466.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/how_to_spawn_an_endermite_in_minecraft.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/taxuzejawikerasigok.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/sudejosepazeridegu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9D 5464 bytes
SHA-256: d9f2587cf1e80ccc8061292e34638a6bf51599e639d04e2cc81d5e079e0e404f
font_01_sfnt_off0000cd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD18 10532 bytes
SHA-256: 5421696b02678c4f87a569dc9d9fbe502ef78099a925120fbcbd778a4e0d7d8d
font_02_sfnt_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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