Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9a5e5b82f06117…

MALICIOUS

PDF

74.0 KB Created: 2020-11-18 14:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69c2369c6a4abccb5846de61aef87191 SHA-1: 533b30e63653c2746e5dcbc589b6024472865d07 SHA-256: 9f9a5e5b82f06117d5c9beb366cc05d2a88a6d523098878a27cc4392288ce7be
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple links to external websites, including a known malicious redirector and a link farm, indicating a phishing or scam attempt. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into believing they have won a prize or are eligible for funds, requiring them to click a link to proceed. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://traffmen.ru/aws?utm_term=teamviewer++for+android+phone
    • https://fobolobal.weebly.com/uploads/1/3/4/3/134317950/xapatonuzu.pdf
    • https://joxiwawetesamiv.weebly.com/uploads/1/3/4/3/134306419/zurijim-nerupukove.pdf
    • https://wosabizovores.weebly.com/uploads/1/3/4/5/134577485/walojajofe.pdf
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/gatebo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f1de961a-5eed-4fce-bc5f-07ab162b9578/planos_de_casa_habitacion_1_planta.pdf
    • https://uploads.strikinglycdn.com/files/3efb15c7-52dc-4c3c-933d-8914a95fd8eb/28932371423.pdf
    • https://uploads.strikinglycdn.com/files/fce2dfde-cd46-4009-885b-6cc31587ff20/mr_and_mrs_adelman_review.pdf
    • https://uploads.strikinglycdn.com/files/a3bdfc11-bb2e-4ee4-922b-aba5f48db6e9/15864657655.pdf
    • https://s3.amazonaws.com/muvemasoxaji/mars_coat_king_dematter.pdf
    • https://uploads.strikinglycdn.com/files/e9766ebe-a3c2-40be-ad7d-d5dc577ec204/rusafujegepezemakopowib.pdf
    • https://uploads.strikinglycdn.com/files/178c8935-9d17-446c-ad2d-1e80263854f9/27003135273.pdf
    • https://uploads.strikinglycdn.com/files/485f6888-e254-43d4-a29e-62f872cfa54e/15450807925.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_off0000e1f9.bin
9fc353b594ae48f44e5f5b45be72094e2d3acd7d3aa11ca0f088c01b966ad620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F9 5172 bytes
font_01_sfnt_off0000f37e.bin
294971d09269063e5e75fa30b67c6980bcb51960db875a46392cef59192b873f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 11108 bytes

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