Malicious PDF — malware analysis report

Static analysis result for SHA-256 453aa75deaa3cd54…

MALICIOUS

PDF

52.1 KB Created: 2020-10-10 10:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3df3ff3844052da7030b8f7462421568 SHA-1: 57980c118aecdf7910ee330692fdcb3101b942da SHA-256: 453aa75deaa3cd54cd24314f2a3ea9df3d12e84fecd28353b78ddf56841b866d
124 Risk Score

Malware Insights

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

The PDF document contains a link disguised as a movie download, which is a common social engineering tactic. The link directs to a known malicious redirector, indicating an attempt to lead the user to a harmful website. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.
  • 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://cctraff.ru/strik?keyword=inglourious+basterds+full+movie+free+online+with+english+subtitles In PDF document text
    • https://site-1036874.mozfiles.com/files/1036874/xuxusubugewikuter.pdfIn PDF document text
    • https://site-1038811.mozfiles.com/files/1038811/4221821542.pdfIn PDF document text
    • https://site-1041944.mozfiles.com/files/1041944/kuxopidagares.pdfIn PDF document text
    • http://zixaxebu.beavaisrogue.com/uploads/1/3/1/3/131380183/norikiwepid_dumobitevinod_gedaxoregoxaje.pdfIn PDF document text
    • http://files.ceciliabramhallart.com/uploads/1/3/0/7/130776483/xijawepi-tajirekonofa-birasi-tategasaja.pdfIn PDF document text
    • http://gudoxad.valeriemadden.net/uploads/1/3/0/7/130776716/xujonopasurekukigu.pdfIn PDF document text
    • http://files.bychoicewellness.com/uploads/1/3/0/7/130739027/48edf96bb4b.pdfIn PDF document text
    • http://files.cardiffbachoir.org.uk/uploads/1/3/1/4/131407440/7587046.pdfIn PDF document text
    • http://files.fbcrevolution.com/uploads/1/3/0/7/130775350/supefoguj-gufamobigamu.pdfIn PDF document text
    • http://tonow.oldschoolsailing.com/uploads/1/3/1/6/131606295/zonijitekojo_xasonitamet_gilapuzenilekev_muraf.pdfIn PDF document text
    • http://files.terindahestate.com/uploads/1/3/1/4/131437780/sawiwavoj_vazotejujeda.pdfIn PDF document text
    • http://files.oldepearprimitives.com/uploads/1/3/1/4/131406892/8171712.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/22f51cd7-d5a0-4066-b423-fbeee1d98854/21949798034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5673ed47-1350-4cee-97be-45cdb48d955b/gejid.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6389 4240 bytes
SHA-256: 4688e04d614c35314de9a058c039791aa88ce47dd90dee907ebb2b5f28ee1749
font_01_sfnt_off00007251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7251 5552 bytes
SHA-256: b663a784c397824633f85ace58cc320354397a3ed0218c4f6e3391039bb69f71
font_02_sfnt_off00008519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8519 10324 bytes
SHA-256: 88842a635d30f5b3eb384ee41caf0aa733380052f35e276df91cd0a70a4c9b5d
font_03_sfnt_off0000a8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B0 16688 bytes
SHA-256: f7154ef9db3b1a67eb06a622fa599851605fdb3de9cd7f1d1c6b24161248ad30

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