Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54e4a66541434f7…

MALICIOUS

PDF

65.0 KB Created: 2020-11-10 08:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a0a49c2998d0cd3fb8cf1b4630dd49dd SHA-1: 12f23fe78a0b35d75197b5aefa7b082f48bc0671 SHA-256: c54e4a66541434f753d8b9b0ec9960a4804413bd90b3345f7146f02393f56c95
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs point to known malicious infrastructure, suggesting an attempt to phish users or direct them to further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/aws?keyword=2%252F2%252F2020+%253D+0.00049504950495 In PDF document text
    • https://vefozifus.weebly.com/uploads/1/3/4/3/134382693/nilujepajuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f8f7a37261f4.pdfIn PDF document text
    • https://zufeburiz.weebly.com/uploads/1/3/4/3/134320035/5588739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f9cbcbf5fc87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5f9b13a80cef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417983/normal_5fa5b3c79816f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489052/normal_5fa8a43aa3033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_5f98db745a092.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/kerapawenojup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5f9d9b63295a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f8e8fd5892ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f98afafb92aa.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
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A8 4152 bytes
SHA-256: 744b9fc463f1b96219a2d58074131ea2e2d396a902b43dfcacb1c3f11a5f4030
font_01_sfnt_off0000c4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BC 10656 bytes
SHA-256: ba67142d6833918aea51d79ccf1fa737760e2fa7d904f28e382558b98eea5a93
font_02_sfnt_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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