Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3fc34c06e6130e4…

MALICIOUS

PDF

82.4 KB Created: 2021-02-16 19:31:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d1bbd16be459a4ee6a20145e443b3772 SHA-1: 4c550bfac692998cf4390d034ad0d49f93aa80c6 SHA-256: e3fc34c06e6130e452d343e164d750d911f398a20b77bdb8939823ad680699b4
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'animal olympics math worksheet answers'. The presence of a link farm and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/wix?keyword=animal+olympics+math+worksheet+answers In PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/xogute-satigijanav-fezewedido.pdfIn PDF document text
    • https://kukibutojiw.weebly.com/uploads/1/3/0/7/130775835/a03f4e7fd86.pdfIn PDF document text
    • http://cloudmarket.website/dututinufif5jyh6.pdfIn PDF document text
    • http://kinokaiff.space/annexure_k_for_pf_transferf5rl7.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/haVCMiL/dog_fighting_quarterback.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/gBjSDxt/8635052175.pdfIn PDF document text
    • https://bakadowo.weebly.com/uploads/1/3/1/3/131380427/5100856.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/cYheigd/the_very_best_of_the_eagles_cd_cover.pdfIn PDF document text
    • https://fatatarulawug.weebly.com/uploads/1/3/4/4/134474158/4192916.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/vubomef.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/gjijbEs/zombie_diary_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/ijhfjdp/61920148064.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/firigugixujotov/19599185090.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/gurato.pdfIn PDF document text
    • http://bepinutarefe.rf.gd/cat_software_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/bloodhound_gang_foxtrot_uniform_charlie_kilo.pdfIn PDF document text
    • http://xumomevafuvozup.rf.gd/metaxarularisik.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_off000106ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AE 5420 bytes
SHA-256: 65a1e2a664601831f2be37713ce672570914d9622ff60291d40690738d654f46
font_01_sfnt_off000118ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FF 10408 bytes
SHA-256: dc55634237a32b6fe07913d920daa91d25dc3ec8f92dd1458cebf499bb310800

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