Malicious PDF — malware analysis report

Static analysis result for SHA-256 147cdbee663d1846…

MALICIOUS

PDF

73.3 KB Created: 2021-01-31 10:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 531af707cd35e9cd0c878efbc2a1ab10 SHA-1: f7b834a816a6b14491e24a0970ea6770c2415592 SHA-256: 147cdbee663d1846675ea79cbed83cc6f1152b8de8ec65b6084279b9be118c1d
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one identified as a malicious redirector (traffmen.ru). The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text fragments suggesting it's disguised as a quiz or manual, aligning with phishing or malware distribution lures.

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://traffmen.ru/wb?keyword=new%20world%20history%20and%20geography%20quiz%2035 In PDF document text
    • http://opit.space/3666449227wlnne.pdfIn PDF document text
    • http://rm-swis-mine.com/production_planning_and_control_local_author_bookk8rx3.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/wofaxeduzusapape.pdfIn PDF document text
    • https://mejoraxu.weebly.com/uploads/1/3/1/3/131380998/29c1cf78a59d2.pdfIn PDF document text
    • http://remontlegko.info/94036695539r36w.pdfIn PDF document text
    • http://itclick.pro/433461811829ku9w.pdfIn PDF document text
    • http://lifegirls.site/shooter_movie_plot_holes326r4.pdfIn PDF document text
    • http://grizhoff.ru/zesixudu0lxy.pdfIn PDF document text
    • http://whitetwo.space/city_car_driving_tofa_yamasov46u.pdfIn PDF document text
    • http://minuette.me/pioneer_appradio_3_sph-_da2105nptj.pdfIn PDF document text
    • http://goproonly.com/wujiguvoravokorokavezuwu7566s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tituroxir.rf.gd/catalyst_2960-_x_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/fcpx_motion_templates_folder_location.pdfIn PDF document text
    • http://bukaduxanob.epizy.com/looloo_nursery_rhymes_mp4.pdfIn PDF document text
    • http://viwapuzajor.epizy.com/shiki_eau_de_vie_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/whatsapp_status_video_punjabi_30_sec.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/kujemetujusetemiwo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 5848 bytes
SHA-256: 79751c6de49fabbdecb73e25bc3f87ad45cf8a033287b9ec9e72ee2e10e5b6be
font_01_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 11164 bytes
SHA-256: c1f428669f79a42ea75deb91019ea329eb4ccb471c01674167a0839e122ddae0

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