Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5071ac620306c44…

MALICIOUS

PDF

81.8 KB Created: 2021-03-13 20:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74f72a859a05f4933e68a62ecbf52c5a SHA-1: 526d09bb54efb12ba97471033382f45d75e227ec SHA-256: d5071ac620306c44fa4e87a19a077832b78acc5c465ba94342f281f80ee4e6a4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The document's structure and embedded links indicate an attempt to redirect users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://golowaki.ru/award?keyword=medical+abbreviation+dictionary+pdf
    • https://javufivupa.weebly.com/uploads/1/3/4/3/134349262/diwolaxadile.pdf
    • https://nogexumojadug.weebly.com/uploads/1/3/4/2/134235638/7895614.pdf
    • http://lifegirls.site/33885615897ccx3c.pdf
    • https://nanuvofekoredam.weebly.com/uploads/1/3/5/3/135385966/gifarotajibiramejage.pdf
    • http://electrumwallet.buzz/18261022513foi13.pdf
    • https://sakirirolero.weebly.com/uploads/1/3/1/3/131383462/teditu_xatifin_bigavogavolavir_gesuwex.pdf
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5ffc6ddd82747.pdf
    • http://216tilford.com/dr_axe_candida_dietz2ttn.pdf
    • https://cdn-cms.f-static.net/uploads/4454306/normal_60312562a6258.pdf
    • https://cdn.sqhk.co/vagekoxes/ohiAhi6/masusikokepuzaz.pdf
    • https://wuzitefagoxu.weebly.com/uploads/1/3/1/8/131856046/5a982fe89c9313.pdf
    • http://ita-bio.space/52443545374f4lyj.pdf
    • https://cdn.sqhk.co/fegojujor/igNhgDk/kikaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://misovin.epizy.com/onenote_calendar_template.pdf
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_cdd106f17ec14e57acd869a0f2a20918.pdf?index=true
    • https://b89c0965-50b5-483f-b67e-52f573158f4f.filesusr.com/ugd/1e222e_5f57bcc384d841738fb398794bb12853.pdf?index=true
    • http://duletufazipup.epizy.com/accident_report_number_search.pdf
    • http://zemadepa.rf.gd/revorixibevikabasogazimav.pdf
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_d019923eede9409aaba5eba48ef892bf.pdf?index=true
    • http://jerananixakuzeb.epizy.com/26351534062.pdf
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_071e16be1eb041fbb7530acf8e54d148.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010187.bin
f86c97dbf90eca74b90c2c863e44891d01cd0f76ff9f0db0cb0af2b9d17db44d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10187 5280 bytes
font_01_sfnt_off000113a0.bin
5d9ee2ba92c4c55d8a0e56c91d5ea445be17524c20d3314a8a72de456e06ea4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113A0 11140 bytes

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