Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fcf77af6521f5cb…

MALICIOUS

PDF

74.7 KB Created: 2021-01-25 08:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 243b7d119aa255e77f9e0ac390f3e2e8 SHA-1: 627f7016f3e0a61aafdda098368b8adeee116654 SHA-256: 0fcf77af6521f5cb8d0458f9cb461d996737f8b5edbe387b604f155141cc9533
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • 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/123?utm_term=libro+la+edad+de+oro+pdf In PDF document text
    • https://kotasixunepa.weebly.com/uploads/1/3/0/7/130776076/fineloxelew.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/sipudurexepononomix.pdfIn PDF document text
    • http://pomirkapa.site/hd_mini_cam_app_for_macbr905.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372983/normal_6000985d67929.pdfIn PDF document text
    • https://nawivavunof.weebly.com/uploads/1/3/4/6/134669961/besigugimiwumik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476282/normal_5ffb43045d8d5.pdfIn PDF document text
    • https://bozaxadoduzake.weebly.com/uploads/1/3/4/3/134306622/2891599.pdfIn PDF document text
    • https://vokavubibobudew.weebly.com/uploads/1/3/5/3/135316357/970f5ab6.pdfIn PDF document text
    • http://oneshops.space/practice_arena_fifa_20_free_kicks7xwfn.pdfIn PDF document text
    • http://robertferrell.net/zombie_killer_knife_amazon5k9ny.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuponefi/nccn_guidelines_clear_cell_carcinoma.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/76062550948.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/bollyshare._com_hollywood_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/vpn_master_pro_apk_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/demotu.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/sezotugezigalukajider.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/dulanitonuliradeborirowi.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_off0000e686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE686 4936 bytes
SHA-256: 482157a7a42129b9e231dc8261c8ef551795e1ccc49dec4c421b7b7337b525f5
font_01_sfnt_off0000f75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75B 11796 bytes
SHA-256: 503af508c4022a43a57908209789a63922bc36b9639e122ef4278a9dedd46b53

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