Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9241fafaebef40d…

MALICIOUS

PDF

139.0 KB Created: 2021-01-03 12:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5e54892060d58b1daf9cbcd7bedaa974 SHA-1: 9d44f17fabe0561a604729a9ee6488f1e438067d SHA-256: f9241fafaebef40d157401650d159a63e598fd8971e0d504e8fd8781924e71a3
186 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 exhibits characteristics of a link farm, containing numerous external links, many of which point to disposable hosting services. The primary URL, 'https://traffnew.ru/aws?utm_term=second+italo-+ethiopian+war+pdf', suggests a potential lure related to historical events to entice users. The presence of a large number of external links, coupled with ClamAV detection as 'Pdf.Phishing.Trojan', indicates a high likelihood of this document being used to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffnew.ru/aws?utm_term=second+italo-+ethiopian+war+pdf PDF link annotation
    • https://rigopijifotifat.weebly.com/uploads/1/3/2/6/132695828/98d21a9ba42686.pdfIn PDF document text
    • https://xumokiregiw.weebly.com/uploads/1/3/4/2/134266049/df2f09aedb3fc54.pdfIn PDF document text
    • https://sipelebe.weebly.com/uploads/1/3/4/3/134312525/bc44667.pdfIn PDF document text
    • https://jijidiwudop.weebly.com/uploads/1/3/4/4/134481930/1026716.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/motunet.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/7e0fd.pdfIn PDF document text
    • https://rotaxavevun.weebly.com/uploads/1/3/4/8/134884867/jozolis_pulaxowiken.pdfIn PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/2505118.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/03bc65ed.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/c2c5350c-f8d5-4e02-ac13-4f54c59e28ce/19194268340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b2c9623-8e4d-4bd3-8d50-454f47a3f940/paintings_for_sale.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2C9 5292 bytes
SHA-256: 58bd4bb65c235679e314fe452830e59ec716a4a3c368d4cbd9ac1eb2dbb8bd61
font_01_sfnt_off0001f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4DD 12604 bytes
SHA-256: 718d891e17e9c729f946a9d7c1ed8f329db9c36b2deec1cab1663dc9599ac05e

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