Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2847f4319823915…

MALICIOUS

PDF

62.1 KB Created: 2020-11-08 00:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 99f4bab256a5702ec395d726369219fb SHA-1: e6c7ecfaf6f8a9d7ea8d484c5b380a6be79e06b8 SHA-256: c2847f43198239157118e71b329810635d90842486d80aa296b388a0c46fa0e7
126 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, many hosted on disposable domains, suggesting it is part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ML classifier strongly indicates maliciousness, and the embedded URL points to a suspicious domain. No scripts were extracted, but the overall structure and URL distribution are indicative of a malicious SEO or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?keyword=con+ganas+de+triunfar+translation+in+english PDF link annotation
    • https://tibaxefuxi.weebly.com/uploads/1/3/4/0/134017075/49d3a52.pdfIn PDF document text
    • https://suzulazupe.weebly.com/uploads/1/3/3/9/133997697/tipusuzubebu_muvuwizoju.pdfIn PDF document text
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/4078678.pdfIn PDF document text
    • https://kumaneke.weebly.com/uploads/1/3/4/6/134682587/9080149.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/7315508.pdfIn PDF document text
    • https://menerixejujup.weebly.com/uploads/1/3/4/6/134605313/6bd82d11fca.pdfIn PDF document text
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/728f57.pdfIn PDF document text
    • https://namoniwuxixipej.weebly.com/uploads/1/3/4/6/134606628/wemivo_nazixawafu.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/5208618.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2fd0400c-b26b-4c7a-9e04-acfaa93db140/fuwuvoxagozimeniwititad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ed786f-b812-47dd-afe4-c91f629e8008/jodogixezalusur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3377ea-80d2-42ec-96a6-517360ce7e94/maya_angelou_why_the_caged_bird_sing.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/73435554945.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1A 5072 bytes
SHA-256: 4e2b20593611cb3c792aabaa4302a7a95b6a6e03686d35e97e7fb2ec74ff534e
font_01_sfnt_off00009f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4B 12284 bytes
SHA-256: 23d4ab47bb496e7f86f79f79f23e47d76e24970574cbd958cb4235944ddd10cd
font_02_sfnt_off0000c79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79D 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61
font_03_sfnt_off0000dc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC67 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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