Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a830e6243b9156…

MALICIOUS

PDF

83.3 KB Created: 2021-04-04 00:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0e820b33b17ecf1207b4af77f13e68d5 SHA-1: d780c94b1ebc57ae29d910fbecb6ccf127b5250d SHA-256: 03a830e6243b91562dc53212cfb7b4aa09500a90eb8a522508e220e8fd8b09b2
204 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious sites. The primary redirector URL, https://maypoin.ru/wix?keyword=minecraft+pe+0.10+4+download, is presented as a download link for 'minecraft pe 0.10 4 download', indicating a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=minecraft+pe+0.10+4+download PDF link annotation
    • https://cdn.sqhk.co/buwuvibija/bBfGij8/chris_brown_no_guidance_music_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_6041c34d7b848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_604049524394b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366050/normal_5fff7eb873fb1.pdfIn PDF document text
    • https://cdn.sqhk.co/mofokamibe/2jgichf/drum_pad_machine_free_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/hgjalMp/gadaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5fd8bec55b19d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446286/normal_60493053ecc2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_6048de647aeab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489259/normal_5ff540bf1eda4.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/sojenozap/xojobefimowusumiwunuma.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/besiege_pc_game.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/2010_lexus_rx_350_radio_issues.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/fizefodu.pdfIn PDF document text
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_44021fa68fa94bdc94f2e81997efadee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/kaspersky_security_center_11_deployment_guide.pdfIn PDF document text
    • https://8b1d1a20-f0f3-43d5-aeb5-704ac988d6c7.filesusr.com/ugd/9dbc1d_06dd175463664cb9b3d1deb0fc484eb1.pdf?index=trueIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_78c2356a484441369428362680866280.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/rental_agreement_format_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/school_pronouncer_guide_2018.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D8 5384 bytes
SHA-256: d7e1d394777bb29a71df906c53e9a9416cb617a807439785d99ed5ae628c6591
font_01_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 2232 bytes
SHA-256: 6bbe5adaea6a5f128f3f179c83b8a8e2e6f64ca2fc5798ed1c640b05aee0660b
font_02_sfnt_off0001056b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 10684 bytes
SHA-256: 6f567688d3eeb1d4378cbf0ca3b307e51ba485d340726318c26d6a0efcafab02
font_03_sfnt_off00012a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3A 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3