Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a68854810e2fc9…

MALICIOUS

PDF

67.1 KB Created: 2020-11-13 07:34:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0823b6555652c50a384e225b442a031c SHA-1: 2d6be16ac8e36269e233312f18340375415ef734 SHA-256: 25a68854810e2fc93c180aee1125ef3cea89e8fcdc88cfd670e83d75b585cf28
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body contains text related to '732 area code scams' and includes an external URI pointing to a related URL, suggesting a phishing or spam lure. The presence of numerous external links, some of which are benign, indicates a potential link farm or redirection mechanism. No scripts were extracted, but the overall structure and content point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://traffset.ru/123?utm_term=732+area+code+scams PDF link annotation
    • https://muwegejise.weebly.com/uploads/1/3/4/2/134265646/tuzokadopofusaliduxu.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/70af290bfe.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/sogis.pdfIn PDF document text
    • https://tudidufagul.weebly.com/uploads/1/3/4/6/134622529/654339.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/dbb6ae8863eb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d7a2179-e996-4c70-900f-2718c4c2146b/main_teri_ho_gayi_mp3_song_download.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/rarisibukazanebugiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b8b075-69f8-4cd3-bce2-c0afaf6d11e3/potunafapabuwuxanupizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff0048a-4f07-499e-8369-09d1cee93b88/90076969424.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/tm_sign_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/pulofazafumabejezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d25500f9-3216-491a-934b-8a706f6d1b0e/numowufewerab.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/80821575321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5fa3bd-6633-452e-af1f-0b1bcf5f8fab/toyota_verso_service_manual.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_off0000ca4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4F 5336 bytes
SHA-256: 45b41bbf456dad8477aae37e45afd7bd4f51278245e05d0e9f649bbe95c6cb6f
font_01_sfnt_off0000dc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5C 10388 bytes
SHA-256: b4fc349fad4ec9c7d0bc59a5429509b67c82ce069d14e0b77f7368424b6614de

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