Malicious PDF — malware analysis report

Static analysis result for SHA-256 059afb47af648860…

MALICIOUS

PDF

80.6 KB Created: 2021-04-06 08:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c93f8c5a7960e96cb4acfcb52eeb55e2 SHA-1: bbcb05199f9b7179cde3a7d2f9ce74b122b207e1 SHA-256: 059afb47af64886035ea2cd31d3a587e03ab8be5bb19ab848a0cebd0ae8f738c
204 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure and hosts a link farm, with one primary malicious URL identified. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'California termination of month to month tenancy', reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/strik?utm_term=california+termination+of+month+to+month+tenancy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446398/normal_603b7310e6e00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_6050cf17eda37.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/6014210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_602ba3d98ee28.pdfIn PDF document text
    • https://kefuvarunif.weebly.com/uploads/1/3/0/7/130739830/b635a.pdfIn PDF document text
    • https://zavoroxovedigij.weebly.com/uploads/1/3/1/3/131398250/xitibosetibekulenafi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473023/normal_601e6578547e3.pdfIn PDF document text
    • https://xadarerisisiw.weebly.com/uploads/1/3/2/6/132682239/d886b3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390097/normal_5fcaf2e32f5cd.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/4597546.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_272eae537c4a4076aa17ad6ca8b031f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vajefam/ischemic_heart_disease_study_guide.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/zemaguk.pdfIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_cd2a0d9b89334872b262457da7f0dcc3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/24781200026.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/71575119496.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_8730f5511e1d477eb92d99961726b29e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/kenadoxopidurajivowuf.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/free_invitation_templates_graduation_printable.pdfIn PDF document text
    • http://bipegokatif.onlinewebshop.net/kutiwir.pdfIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_656b329c97ae4606bc6e57e07b0a0ef0.pdf?index=trueIn PDF document text
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_03521abf76ee44d8b7f1bd2d32717aae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/9684529118.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/jafebewetorizijaxasipajug.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_off0000fc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4A 4948 bytes
SHA-256: 6e5b585d5489d720c0fa6da101f82e3cc7a1c35cff04c7d90d7896ed3837c930
font_01_sfnt_off00010cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFD 11200 bytes
SHA-256: 79a992663d1f8675d4e151310a6f455cd867d58f991714e00da93fed247f4e3e