Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21768873300a5d5…

MALICIOUS

PDF

67.8 KB Created: 2020-11-22 16:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 19e84c7bf13172b618883a6671967eff SHA-1: b8079c1724026478bead78ff30a695e785db8083 SHA-256: b21768873300a5d557e7657cb779980c610ba790cdc8ce955fd416e24180c998
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, identified as a link farm, designed to redirect users to malicious websites. The primary link identified points to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggests an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=cut+your+own+tree+farm+near+me In PDF document text
    • https://tenasusuboziwid.weebly.com/uploads/1/3/4/3/134349012/4698542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480589/normal_5fb706450d498.pdfIn PDF document text
    • https://sodejokare.weebly.com/uploads/1/3/4/3/134349501/zisus-mofadufakimuto.pdfIn PDF document text
    • https://garagagu.weebly.com/uploads/1/3/4/3/134364865/juwanabedavizawowe.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/9d751e44ad6.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/8817344.pdfIn PDF document text
    • https://konozobit.weebly.com/uploads/1/3/4/4/134456152/dobetawemegorirew.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/3fe82a65-ef76-435a-8038-7e5a79dd7716/rixigikanigimifidevufibu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/el_casarse_pronto_y_mal.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/broadway_crossing_south_portland_maine.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/fukaz.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/free_paypal_generator_no_verification.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/remup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a3b1e24-bced-4aa7-a50c-8d2050669e9c/gallop_and_ride_wii.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_off0000cde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE8 4800 bytes
SHA-256: b971b0586d2a9939f5852d35741dfeba4f70dd296cde48da92f0e551272a3001
font_01_sfnt_off0000de3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3B 10748 bytes
SHA-256: 0dc1e3bcebab62cf3886407379223c6c8bd473b18d6e9539bcdab933f4fdfb8c

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