Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5b9dd85a5a7886…

MALICIOUS

PDF

84.0 KB Created: 2021-04-05 03:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2fc987788bf26a1aa42886beeb5a5fd SHA-1: ee9ec81af91c67fbd7cd724b1abe9f2c454232c6 SHA-256: ce5b9dd85a5a7886d88ab50331323e4290e21d98b3432dc080faa275f1a25d7e
222 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics, including a malicious redirector link and a link farm, indicating a phishing or scam attempt. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'yafferge.ru', are highly suspicious and likely lead to malicious content or further phishing pages. The presence of a download button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://yafferge.ru/123?utm_term=ab540+affidavit+form
    • https://vutuwito.weebly.com/uploads/1/3/4/7/134713255/955fa7e4b4a.pdf
    • https://buwavazazaradig.weebly.com/uploads/1/3/3/9/133999961/zazaviw.pdf
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/fa964e1d69ebd5.pdf
    • https://vusukiziroge.weebly.com/uploads/1/3/0/9/130969505/b0c685289c650b7.pdf
    • http://healthytrands.com/30198770307ifefo.pdf
    • https://xuwizaku.weebly.com/uploads/1/3/1/6/131606213/zikuvu_sokogefemunu_dewoxemibejijo_gewazufinereg.pdf
    • http://sizegivip.22web.org/sakezakogizuxararupe.pdf
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/gizonuwefukaledepu.pdf
    • http://idealica-uficialeitalia.website/78094339787zf9qw.pdf
    • http://antonioit.fun/age_of_empires_2_steam_mac_osbif4u.pdf
    • https://nofakefol.weebly.com/uploads/1/3/4/3/134341926/3534040.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/362b4de3-ed74-4f0d-8766-309ce485153a/lord_of_the_rings_in_order_and_hobbit.pdf
    • https://uploads.strikinglycdn.com/files/20a809c8-8f32-4627-9445-286d1d5a2571/what_is_meant_by_critical_review_literature.pdf
    • https://uploads.strikinglycdn.com/files/de74b528-37f3-49f0-ba44-c254b094518a/zufabiwifakobajevowokuvo.pdf
    • http://ferirapavo.epizy.com/dixitosanemopijize.pdf
    • https://uploads.strikinglycdn.com/files/6422b734-2b88-4784-b1ed-8d0357d46bbf/metila.pdf
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_1a5f36ce3e51453a9bea804d2af2ee6f.pdf?index=true
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_518a9bbcd150447fbebe87bbf608bf3d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7dd937c0-6f20-42bc-b384-9bb31affea41/tesla_swot_analysis.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f538.bin
2750f8f5da448e6d7840af877c541e5936290201a21e70bad7511cc0c5941543		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF538 5388 bytes
font_01_sfnt_off0001078f.bin
08c2ebc291b509ec82d538f767e7d59af77995170aea8c64e75bceabf06bd826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 11136 bytes
font_02_sfnt_off00012daa.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAA 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.