Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc213a89971395c7…

MALICIOUS

PDF

77.8 KB Created: 2020-10-08 20:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f4d692125b35831f2d70af5b989c2c34 SHA-1: 39ac41bcc33b01240045be31519b6360fc8bd575 SHA-256: dc213a89971395c7b345d23eac8615e6493f9c555597c0841e76ca49097ed402
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting and are likely part of a link farm designed to improve search engine rankings for malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at https://cctraff.ru/strik?keyword=sabarimala+temple+case+judgement+pdf. The document body, though heavily obfuscated, contains text related to a legal judgment, suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=sabarimala+temple+case+judgement+pdf In PDF document text
    • https://site-1040400.mozfiles.com/files/1040400/depegadovoferasu.pdfIn PDF document text
    • https://site-1039814.mozfiles.com/files/1039814/rowaxaboxaloxeku.pdfIn PDF document text
    • https://site-1044200.mozfiles.com/files/1044200/zemibiti.pdfIn PDF document text
    • https://site-1039127.mozfiles.com/files/1039127/21683920066.pdfIn PDF document text
    • https://site-1038402.mozfiles.com/files/1038402/momakusimobisenodudijew.pdfIn PDF document text
    • http://files.aquitaliayachtsusa.com/uploads/1/3/0/8/130813779/2228fd18881a7a.pdfIn PDF document text
    • http://files.thenextstephorses.com/uploads/1/3/1/4/131483149/betuv.pdfIn PDF document text
    • http://files.averageguyreviews.com/uploads/1/3/2/7/132710780/3613293.pdfIn PDF document text
    • http://files.profskye.com/uploads/1/3/1/3/131379935/4356421.pdfIn PDF document text
    • http://files.djindyproductions.com/uploads/1/3/0/9/130969576/weful.pdfIn PDF document text
    • https://site-1039510.mozfiles.com/files/1039510/gilajumu.pdfIn PDF document text
    • https://site-1043607.mozfiles.com/files/1043607/wevagebejelusorofijajagom.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
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/joint_service_commendation_medal_ribbon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/we_can_be_heroes_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0778/9221/files/21236986051.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 5568 bytes
SHA-256: e2ce508a1db8af1b76f6631c1632513a3d327c99f7db13bc4efddabf4ea55680
font_01_sfnt_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 10276 bytes
SHA-256: 7d007f674d8632f9e3d85944082cd32c6f30485e405d8c99eecddb51412b6bb9
font_02_sfnt_off00011b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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