Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4728748e63a1bb…

MALICIOUS

PDF

66.5 KB Created: 2020-12-19 15:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 99d42a68119b6a3012ea2ff791bc4b67 SHA-1: 912521c1a95167d23abed6323c7c98558e085c29 SHA-256: 9b4728748e63a1bb2c4d7ac395f3df8bd843dc9549e893718bd8007bd3546421
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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/strik?utm_term=john+character+in+the+yellow+wallpaper PDF link annotation
    • https://nevonanopovew.weebly.com/uploads/1/3/4/3/134335048/4391554.pdfIn PDF document text
    • https://rogejizerabori.weebly.com/uploads/1/3/4/7/134763318/getama.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/7990608.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/f2a82215a.pdfIn PDF document text
    • https://gafekiwukuwemul.weebly.com/uploads/1/3/4/3/134313713/pizulim.pdfIn PDF document text
    • https://sekamaxe.weebly.com/uploads/1/3/4/5/134590712/a5db3f1befc.pdfIn PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/1424611.pdfIn PDF document text
    • https://jabiwogox.weebly.com/uploads/1/3/1/4/131453485/5781889.pdfIn PDF document text
    • https://mitixomog.weebly.com/uploads/1/3/4/8/134859124/jiretoj_dilar.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/7683a952-9ed6-4fd3-984c-9b3d185ae5eb/xezopimovalorawumexur.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/kenovatigeda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12ec9f7cf8c75402cc175/t/5fc4824c3485235c8656c416/1606713932777/nietzsche_the_gay_science_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943572c3-921a-483f-a195-6961791876ae/epic_store_gift_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda86a3b-fe38-45c6-957e-f583b829a2a4/chapter_31_reptiles_and_birds_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123d45b0-d529-4a83-933a-693ff5172f24/dunegejaxokijabirolaxa.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75D 5028 bytes
SHA-256: eafe04423a9e517abca658f5a539ba873838ed5dde15435121b22dfcdfe7018d
font_01_sfnt_off0000d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88C 10764 bytes
SHA-256: a4808af12822426a9d3e2005a508e3ce1da787f8dec03dc8724d9daf537587cd

Open this report in the interactive analyzer, or submit your own file for analysis.