Malicious PDF — malware analysis report

Static analysis result for SHA-256 241530098f0ad753…

MALICIOUS

PDF

77.9 KB Created: 2021-02-11 18:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 98c0ea998b833263c64b138f57ea46b0 SHA-1: 77710a6d98f7cf41b89e168f111d960474015a24 SHA-256: 241530098f0ad753c329305223eb2d3fdb415fdc41e6d6df19db2c5ebfa29322
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO redirectors and potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=will+of+the+moon+ffxiv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367019/normal_5fc60561dc738.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/cOUejcj/copper_price_per_pound_ct.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/zamijorenip.pdfIn PDF document text
    • http://kzrovk.xyz/herbert_l_clarke_technical_studies_phl4rb.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/l3iehdV/jesupopiloribexasor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475738/normal_5ffae66017cd8.pdfIn PDF document text
    • https://nesaresivegixan.weebly.com/uploads/1/3/1/4/131453215/nafubukexoz.pdfIn PDF document text
    • https://fexupewoxi.weebly.com/uploads/1/3/4/6/134619994/lixitid.pdfIn PDF document text
    • https://taborufizuxedo.weebly.com/uploads/1/3/5/4/135400835/ab547a.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/1167101.pdfIn PDF document text
    • http://invitesistem.ru/dxxfx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_5fe9564552e4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381735/normal_5fe4e7187d518.pdfIn PDF document text
    • https://bemezonef.weebly.com/uploads/1/3/5/3/135389856/dujokiwes-mufukuzuzorinol-zotapawage.pdfIn PDF document text
    • https://cdn.sqhk.co/faxiwapa/hchhjdu/44799862506.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/bisute/sivimifavupujakilijol.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/12279768276.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/73364653431.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/pelabuwerofukotej.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/asus_transformer_mini_boot_from_usb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D5 3032 bytes
SHA-256: cefa8d5f4905a55a0bc527414bea976b1a43edf5dac017468715c2ff2cc7896d
font_01_sfnt_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 4664 bytes
SHA-256: 183390db5dfb519f4cab70df5fac1af5a15fa23855bcc1004790608489213ba2
font_02_sfnt_off00010269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10269 12184 bytes
SHA-256: 0d2e305edd7288ecf91f4ef7c62a4b9c55526dfc569ef2d2b8eee588422d5781

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