Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b30b12b25eca24…

MALICIOUS

PDF

77.8 KB Created: 2021-02-23 11:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f7493490e6e8822bd9ecc118bcfd262f SHA-1: 5d33e2505dadbfa77853e029d7dcd0c435eb893b SHA-256: 68b30b12b25eca24a5b043176dab2da67c85dbc98f2724c60e750f7726f8a119
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-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://leonvi.ru/123?utm_term=gy6+engine+horsepower PDF link annotation
    • http://arbitestpark.xyz/503301445700j7a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_6013bf141c791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449604/normal_602539ba3f0e4.pdfIn PDF document text
    • http://optarfes.com/43257393408yoy9q.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/ritubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419637/normal_600e4ba4a565e.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/545777.pdfIn PDF document text
    • https://bakasilamor.weebly.com/uploads/1/3/1/4/131407315/2675749.pdfIn PDF document text
    • https://taboxataxenigo.weebly.com/uploads/1/3/4/1/134108556/5833959.pdfIn PDF document text
    • https://vojitimene.weebly.com/uploads/1/3/4/5/134596684/4553238.pdfIn PDF document text
    • http://legalvictory.group/rajisewek33dlz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5ff9aa0e183d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416514/normal_6023718f913a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470532/normal_5fc9ad3b47e0e.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/janodojivi/calculate_aspect_ratio_of_image_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/truck_games_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/best_wordpress_themes_for_business_directory.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_off0000f157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF157 5220 bytes
SHA-256: 37286c717335a3d64f8ae824c748e272a15ab4c1c6629f3d43106d8a4d43f8c2
font_01_sfnt_off00010333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 10892 bytes
SHA-256: cc1cd4ab1090bdd45d12ccadc074063e99d4ad85c0e4658dd627aca740d644e3

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