Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa3442a37245877b…

MALICIOUS

PDF

77.9 KB Created: 2021-01-22 01:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1ccf34ebb17ab31eecff1f16d31177c8 SHA-1: b780f78d3dc20d84fbeb52193222de9b81fa1e13 SHA-256: aa3442a37245877b2a448db97184ebc13e740162cfcf9f8d44bd18d1928c15c8
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Nanda international nursing diagnosis 2018 pdf', aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=nanda+international+nursing+diagnosis+2018+pdf In PDF document text
    • http://dijawobal.iblogger.org/sipupovutimiliwotululane.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415929/normal_5fe1732e23882.pdfIn PDF document text
    • https://site-1246790.mozfiles.com/files/1246790/34607611316.pdfIn PDF document text
    • https://site-1166618.mozfiles.com/files/1166618/makerbot_method_user_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486350/normal_5ff3ff08890cd.pdfIn PDF document text
    • https://site-1208189.mozfiles.com/files/1208189/bopogedujisezikerinew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485704/normal_5ff0846bd211b.pdfIn PDF document text
    • https://ludurodeb.weebly.com/uploads/1/3/4/8/134852143/b83bb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5ff3bcb9d7a15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420599/normal_5ff1650c8f056.pdfIn PDF document text
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/41057506fc2.pdfIn PDF document text
    • https://watilokid.weebly.com/uploads/1/3/1/8/131856522/1393868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_6009fe28c213a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390641/normal_6002daa2a0b54.pdfIn PDF document text
    • https://site-1175656.mozfiles.com/files/1175656/the_cult_of_dionysus_lyrics.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
    • http://votofeki.epizy.com/92436071654.pdfIn PDF document text
    • http://jimeroxivekafos.epizy.com/85497814842.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_off0000e53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53C 5580 bytes
SHA-256: 47ad2b937abd925888e187428ec7135d357b4ed11f23110f2c3caf7dba77df50
font_01_sfnt_off0000f83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83E 10520 bytes
SHA-256: b07d36b6ce848652c461120092a2149e71f8b67451a91c7305d982a4e4f2fbeb
font_02_sfnt_off00011b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B99 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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