Malicious PDF — malware analysis report

Static analysis result for SHA-256 246b569352030ec3…

MALICIOUS

PDF

115.3 KB Created: 2021-03-02 23:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a9ad4a5a6029d4c592b86d75ff4a8027 SHA-1: 1b252cf47955c91ab532081d1bac551a6c077eb5 SHA-256: 246b569352030ec315acede4b8fc4817eb28476f61023b143ad44e2cdcf119ac
244 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=is+orion+a+zodiac+sign In PDF document text
    • https://cdn.sqhk.co/pekotegafod/czBijEb/jajibarunari.pdfIn PDF document text
    • https://wusitezuredov.weebly.com/uploads/1/3/5/3/135314125/d24277710.pdfIn PDF document text
    • https://cdn.sqhk.co/xanapaje/Qcje84q/ridixoralenorokevi.pdfIn PDF document text
    • http://gaxopuxa.iblogger.org/reasons_why_school_uniforms_should_be_banned.pdfIn PDF document text
    • https://pekatube.weebly.com/uploads/1/3/5/3/135393066/6845058.pdfIn PDF document text
    • https://tefegepivovopuf.weebly.com/uploads/1/3/5/3/135311357/weziv-lixoretaxotugi-tewuwopexumil-pagetitewek.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/metavaditorixow.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/ade1508.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/zuwalunomojuw.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/gonoxelesazopo.pdfIn PDF document text
    • http://thechambre.xyz/jesiza1binq.pdfIn PDF document text
    • https://jexuleni.weebly.com/uploads/1/3/1/6/131637506/d3d31347492.pdfIn PDF document text
    • http://1xbet-regi.site/who_are_the_gatekeepers_in_corporate_governancedenf1.pdfIn PDF document text
    • http://xijafagupigor.22web.org/weighing_scale_app.pdfIn PDF document text
    • https://wazolupagod.weebly.com/uploads/1/3/0/7/130775763/ronurifik.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/7gfAjaG/vuwepajep.pdfIn PDF document text
    • http://pressit.space/what_does_chi_number_stand_for_in_medical_termsc2w41.pdfIn PDF document text
    • http://baykamif.space/suzuxesanakotasgh3vp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00015237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15237 7620 bytes
SHA-256: 05854a30250e15a2b8dc6c35a23c6beca1b52114929d140da30beec13691a14c
font_01_sfnt_off00016bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BC5 5060 bytes
SHA-256: a469764bc209feeaa2dc4372f16aeb02fa5bb9da628bd593a39021984265cfcb
font_02_sfnt_off00017d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D10 14092 bytes
SHA-256: 57265bba097c6391c3d3f7e6ca0bac5101c724941454effae58843ad631c5960
font_03_sfnt_off0001a9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9FB 16144 bytes
SHA-256: 33b62fdb100bb2923fdbc0a318299d6fe1251535cc2f27f98825267306c21d18