Malicious PDF — malware analysis report

Static analysis result for SHA-256 1456f74cb57c8a4c…

MALICIOUS

PDF

95.0 KB Created: 2020-12-11 18:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1f39f05f4f6de42fcd419f5d797554c7 SHA-1: 628d78497d23284fc83d150c418227cf259691b6 SHA-256: 1456f74cb57c8a4c0952e9f267aa954b13d43333fbb0a4b6a8ff94321fa85785
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://traffset.ru/aws?utm_term=comic+sans+font++ttf', is associated with unknown reputation. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution via the linked content.

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
  • 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://traffset.ru/aws?utm_term=comic+sans+font++ttf PDF link annotation
    • https://dujomujur.weebly.com/uploads/1/3/4/8/134883281/5010247.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/2a691d99aeb6e7b.pdfIn PDF document text
    • https://sadakijawezawu.weebly.com/uploads/1/3/4/5/134595959/3224840fd1e6.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/ad83b4228.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/fuzepaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc64a29e2fce462bcb0a474/t/5fc8c60a90a4f8549d80c449/1606993418546/idle_makeover_hack_apk_mediaf_re.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe3478c-b65d-4b6c-8082-fc81a22b5884/80659684760.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66592affbf90a66102224/t/5fcd4d8d260a660a6bea05b7/1607290253613/53928588634.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/kegafasuzivul.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/killer_joe_benny_golson_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e155104edf1d7780ac3e/t/5fc22c2b1972c46e3ce78f3a/1606560812943/element_50_inch_smart_tv_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5d6064-53f0-4f16-b573-00652e07ebbc/74166735462.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/futurelearn_certificate_of_achievement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe645bf-cb7d-4c39-9e53-8259fad4390d/ley_numero_100_puerto_rico.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/90114381767.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC817 4804 bytes
SHA-256: c5370b84ea65433dd76ecd5efd20ebcc4d7f94400e59ae787447d2609a3dc359
font_01_sfnt_off0000d858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD858 2276 bytes
SHA-256: d7e2937366a98b2839b78b638da20c9603f19b22c9bf66601f50890d206536b7
font_02_sfnt_off0000e2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FC 49692 bytes
SHA-256: baa8c70a59a0111f6fb00586cdfdd4e67431c7141f9ce5574a01eb15c3ed6643
font_03_sfnt_off000156a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156A5 16928 bytes
SHA-256: 564bfd8ec2fdc26d696b8e4284050a8a25fa368e5cbdc710b97f098e78da6b2c

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