Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d36564e14b9375…

MALICIOUS

PDF

73.4 KB Created: 2021-04-30 03:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c63873e3f717f7048105c8b41cf03a5a SHA-1: 3f38f583e4d0aceb12615d9bfdbebc688d58e78c SHA-256: d6d36564e14b93751f607406396a3d147f1579792dbe681baf1336f35b8a4b2c
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crophysi.ru/strik?utm_term=carry+on+norah+jones+lyrics+traducida In PDF document text
    • http://itwow.info/jerome_biblical_commentary_freecbdy1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460449/normal_602abfe4d9b6e.pdfIn PDF document text
    • http://ersoil.fun/how_much_do_hvac_techs_make_in_pa6ivop.pdfIn PDF document text
    • http://pasendapp.online/115616626794gb5l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_6039acba21030.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/jhjahNv/nifapaxukimupavajawenilo.pdfIn PDF document text
    • https://fimulumalopa.weebly.com/uploads/1/3/5/3/135326017/debugi.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/fuzewageketuvutanod.pdfIn PDF document text
    • http://fb-ig-copyright.com/xetosunolak9xdq4.pdfIn PDF document text
    • http://g2am2e.xyz/72744304507hexwv.pdfIn PDF document text
    • http://prosucre.pro/what_is_the_law_of_succession_in_biology9kgzq.pdfIn PDF document text
    • https://cdn.sqhk.co/pidenali/gfgeiJx/rabewanibalad.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/cBhchds/58070228202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_604ad88968f9a.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/9v42ja0/taxosose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491725/normal_6012d20db0eb6.pdfIn PDF document text
    • http://chestlune.online/roald_dahl_esio_trot_movieqomdl.pdfIn PDF document text
    • https://falojabuvo.weebly.com/uploads/1/3/4/7/134774067/3fc11d43d77131.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/rorives/2815491374.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/76901582880.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/24317317968.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/98622864425.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/dynamics_of_machinery_haideri.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_off0000d6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C9 5112 bytes
SHA-256: 74a53a8b0976d8b9fca510eb0ca26af3432ca2b51cf4926d233c5130d29674b1
font_01_sfnt_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 15172 bytes
SHA-256: f043e671dea7ea2218dad715360c7f436880c141db9e9aead4e8d074b210f4eb