Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3f0bcf5990f774…

MALICIOUS

PDF

83.0 KB Created: 2021-02-22 23:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e51f8b8581ebedab81cce2c7ccbd7a28 SHA-1: 18e4166fb5cf566eb427600c7d75287d6c54c53a SHA-256: 0a3f0bcf5990f7746741f94b3c0025caae6da51a46f475e841df32b7c5ea71f5
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to link farms or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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/wix?keyword=ar+words+phonics+worksheet PDF link annotation
    • https://cdn.sqhk.co/zidexamuwela/aiegfkX/snake_vs_block_hack_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480581/normal_602bf5a04863e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378378/normal_6005fa4b0e11b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_6014d909826b3.pdfIn PDF document text
    • https://cdn.sqhk.co/nagebagem/0RgehhA/17255137832.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/djfIo8y/musician_simulator_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_6019ff3acad67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fc9b013cd559.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/gYjdgcz/86654585688.pdfIn PDF document text
    • https://cdn.sqhk.co/nejijilo/aERjhn3/49372806376.pdfIn PDF document text
    • https://cdn.sqhk.co/setewefasari/ijbidih/bc_women_s_ice_hockey_twitter.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/84984102641.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/jiaghjc/gorasigoredanidojaruxom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414152/normal_5fdf5e2c48c86.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://wozawexopad.epizy.com/traffic_racer_mod_apk_revdl_money.pdfIn PDF document text
    • http://zusobudem.epizy.com/10622431315.pdfIn PDF document text
    • http://nizalag.rf.gd/zatixoxalubafado.pdfIn PDF document text
    • http://liwubujuwu.epizy.com/boom_beach_mod_apk_hack.pdfIn PDF document text
    • http://sogonuvusawi.epizy.com/rolerimodimosiwoxofe.pdfIn PDF document text
    • http://nitovotiroxe.epizy.com/feudalism_in_europe_answers.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBB 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off0000fbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 4852 bytes
SHA-256: 2a1c001ab186436e896ae2b375e6addeda7f55e665c5780d93126555f2ca17f0
font_02_sfnt_off00010c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C36 10516 bytes
SHA-256: 2da8d69f1dd633c5f9b108be557aa67d6bcbf0bac19c1afe06f8bd36fb940c93
font_03_sfnt_off0001303e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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