Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa54ee81c49e8bf0…

MALICIOUS

PDF

74.9 KB Created: 2020-11-13 05:01:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d1cf1d120d3844e047165dc51bb7178a SHA-1: 0684751e51fddfda38dc0948d2fbe7bcb0af109e SHA-256: aa54ee81c49e8bf030ac1f844bcd41aa594118cb6678b851ee6627ddaa4b6729
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?utm_term=character+sheets+dungeons+and+dragons+5th+edition In PDF document text
    • https://tusukufuduma.weebly.com/uploads/1/3/4/4/134458322/4126362.pdfIn PDF document text
    • https://zoniziwaxetoxa.weebly.com/uploads/1/3/4/4/134441104/7765373.pdfIn PDF document text
    • https://mimejomukokije.weebly.com/uploads/1/3/4/5/134510045/5810232.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/sakitivezilike.pdfIn PDF document text
    • https://dubanivexog.weebly.com/uploads/1/3/4/3/134331992/palamudejazede-lesariwowonuv-jujepev.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/2022436.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/1144720.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wizedumi/13229594983.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/45645091297.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/fantasy_footballers_udk_coupon.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/74336084746.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/zarivusikob.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/98359428986.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/aparato_reproductor_femenino_funciones.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_off0000e749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 5196 bytes
SHA-256: 7f12070ca92fe8793b51ad47f897692e9726e082a42f7844de3ec6127c7bd551
font_01_sfnt_off0000f8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E8 11616 bytes
SHA-256: 2a251ce72dc1511e3fba2d49b32231e6eb13dc48906b80875f0aa5c7119c9b22

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