Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b2328eac66b305…

MALICIOUS

PDF

128.9 KB Created: 2020-11-14 06:37:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 68033a0fdd0f7b51301b8defb8f72b6e SHA-1: 143e76760130b8c89856c6ae35758ae7166e5554 SHA-256: 58b2328eac66b30593e58b3cdfcdbb7b3a0994f5c94708df85a466a23c6a0901
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous external links to other PDF documents hosted on various domains, including 'traffine.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a potential SEO manipulation scheme or a distribution point for further malicious content. No scripts were extracted, but the presence of external links implies an attempt to redirect the user to potentially harmful resources.

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://traffine.ru/aws?utm_term=base64+encoded+pdf+string PDF link annotation
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/670756.pdfIn PDF document text
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/ca88aca62a6c6ee.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/zabejezuwik_fixurixuvix.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/7c6269aba0239.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/pifaboti.pdfIn PDF document text
    • https://dugilosokufaku.weebly.com/uploads/1/3/4/6/134610324/julalavaruxosomoku.pdfIn PDF document text
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/vefutofomexiforikon.pdfIn PDF document text
    • https://vimadefivikimaw.weebly.com/uploads/1/3/4/2/134265378/suxinalus.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/vigulusudeloku.pdfIn PDF document text
    • https://mipolapepel.weebly.com/uploads/1/3/4/3/134395859/daxegukodewaroj.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/popagexexoza/how_to_be_a_modder_gta_5_online_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aad0dc3-12d1-496f-afeb-07003dfadd7a/ds2_sotfs_master_of_hexes.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A072 5584 bytes
SHA-256: bfa21d70b1b6d2e6096a13213c2c2cf63782f153589e44febe0acb7f818a90e6
font_01_sfnt_off0001b386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B386 13660 bytes
SHA-256: 116b4b249c15601c899872cfcec801b89b7ac06f49b47b4687f1c450245f7d21
font_02_sfnt_off0001e176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E176 16100 bytes
SHA-256: f8c9e7dd368a75da86b66dc164f776a1206bfd52fa73a24dccf6f58fdb15a864

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