Malicious PDF — malware analysis report

Static analysis result for SHA-256 683e0f5fde1564a6…

MALICIOUS

PDF

87.7 KB Created: 2020-12-23 14:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0250844360242f1588a4b692703d6f82 SHA-1: 3f6e13bf6d4e9124bb0d969773a800eb7e5b8eae SHA-256: 683e0f5fde1564a6b120a04b8fda5f88565be5e028d86c7f144d47150f8d7e58
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including one pointing to known malicious redirector infrastructure, suggests a phishing or SEO manipulation scheme. The ClamAV detection further supports its classification as malware, likely a phishing variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gettraff.ru/aws?utm_term=animated+instagram+story+templates+free In PDF document text
    • https://dibexawalezi.weebly.com/uploads/1/3/4/7/134760597/tekaxuvop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_5fb7ff8dc4d25.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/3d21f99.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/nuzekavojo.pdfIn PDF document text
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/fasenosumin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fdde34d7ff37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f9cb502486fc.pdfIn PDF document text
    • https://sefokasezasun.weebly.com/uploads/1/3/4/6/134690402/808420d3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495838/normal_5fb9e49dd0964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f8b10df5a0f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366346/normal_5fdf5a4cdf737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_5f967b1328d10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/fawob.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/ragapuleveramub.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/11303005577.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/kixulazawuzekinupijuneful.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/napivawit.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/8774704889.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/aoac_method_1990.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29B 6588 bytes
SHA-256: b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831
font_01_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 5452 bytes
SHA-256: 21fb934c322cc2c348139172d49d2c56f1eb4ee26a05b9c820587ccc75c1a858
font_02_sfnt_off00011590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11590 11128 bytes
SHA-256: 687fb3496c8f9c8cea7d5d261ccabeee7f4a668dce2c43a265ae7bea9ff3719a
font_03_sfnt_off00013bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC4 16132 bytes
SHA-256: 38fcf4ea3c4064495b9c09a7ef6946f56b1194f5b917bad2175a3786c2c34ca5

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