Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f15653b3556e729…

MALICIOUS

PDF

66.4 KB Created: 2020-12-17 08:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 02349b3d7fb2b614eb65d48633472445 SHA-1: dfc155254cc19668d248e56ac72e03eec06c0e40 SHA-256: 1f15653b3556e729145b02259a2935b5d6c3cb2a647d8db616451fd00d42ae34
156 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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffking.ru/123?utm_term=lines+and+angles+practice+questions PDF link annotation
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/wisidijawewat.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/d5ed7d87-62a5-45fd-bd14-c248dd49b4cf/befitipajeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e235b1f8-b654-444e-a2ef-b5b65adc9aca/zofadifonaxafimawonuwoju.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36a5ebda9c57a97ce2be0/t/5fc9a0d7be6684539de52617/1607049432157/cheats_for_gta_5_online_ps4_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9489927-9ad1-4724-b99b-a08dace876d2/tojigilugikopikezuvulazow.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/galletas_salvado_de_trigo_informacion_nutricional.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e08512facd59ceacd9cd/t/5fc38cdf3c6ccf69f3cc3044/1606651105941/zekepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8893970f-e76d-4675-bc48-c10874d03b3e/1555294858.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf582361e25426e12fc2e3/1606375459736/vikatunurofawigujopugisu.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/aieee_2012_paper_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136c1799-d930-4ed5-8806-f4d2b8fa32ea/33597288017.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB16C 5308 bytes
SHA-256: 5f6a28c95e0de8822c6d38e7bce0687cdc1fb8edf0faa7fbcb80c247b0de42cf
font_01_sfnt_off0000c388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC388 10616 bytes
SHA-256: f4581173515cbfc9b14e81b2541019f5888ad06990980905c726e69048ff46b5
font_02_sfnt_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 16072 bytes
SHA-256: 24c5c481937acf4f4841e6563a6d7a18cfdb810806c94b09ac0ff4033348c1e6

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