Malicious PDF — malware analysis report

Static analysis result for SHA-256 e303eff06ae1fad7…

MALICIOUS

PDF

86.6 KB Created: 2021-04-01 23:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 98632a7181717cf83991fba1dedd4979 SHA-1: c22510c585b8cb639bf21ef8b100af357b315556 SHA-256: e303eff06ae1fad701904787bd081d054228c4281b0a506e173730c479f8a4e6
196 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to redirect users to malicious sites. The primary malicious URL identified is 'https://soxebez.ru/strik?utm_term=what+causes+high+blood+pressure', which is presented as a lure related to health information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://soxebez.ru/strik?utm_term=what+causes+high+blood+pressure PDF link annotation
    • http://suberubepuparo.getenjoyment.net/vetesebumeboxomuzisejizu.pdfIn PDF document text
    • https://cdn.sqhk.co/zirixegip/fuGjejg/dutomimavevodo.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/hibQQPB/pongo_and_perdita.pdfIn PDF document text
    • http://kihepc.xyz/4054269689865eho.pdfIn PDF document text
    • https://cdn.sqhk.co/xojoweva/giZVxja/6587282811.pdfIn PDF document text
    • http://mon-cmbretagne.com/job_description_of_restaurant_general_manageroc91r.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/jevhjid/bmx_boy_apkmonk.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/setaxilitozuko/wokomogobevulos.pdfIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_a9a5efb8213a406288a054de7ed88df2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/the_best_ice_cream_makers_ever.pdfIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_8c11d30543cc47d4b4539538c5cc92af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/how_long_to_cook_waffles_in_cuisinart_griddler.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/fozopezi.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/slidehunter_ppt_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/dooars_guide_map.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/runarufupaveb.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/tuguf.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/konojupixopizivaxal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001000e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000E 5488 bytes
SHA-256: 8c69e61afc97b905e62e03cedc53a7006b9c732911403759c503f049f50a5085
font_01_sfnt_off000112ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BA 10760 bytes
SHA-256: 29e23374eabecc797b56c1ae753fb2d84280f3a37612c82b5a19a895c4b2a1b1
font_02_sfnt_off000137ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AB 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3

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