Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2bd68ea9509aa2…

MALICIOUS

PDF

79.3 KB Created: 2021-09-23 06:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d9270b7c17688f91469bfe81d88b2481 SHA-1: 6aa3b15686d3505f7c07e33c1d013c2fd7d185b1 SHA-256: 2e2bd68ea9509aa2ea6e8c58cbf32b190c94049eea4ee61e318481b1dc899f2a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs hosted on various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of a 'download' button lure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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 http://pc-driver.ru/userfiles/files/23106371262.pdf In PDF document text
    • http://hutnia.pl/userfiles/file/kozaxowolijigoma.pdfIn PDF document text
    • http://grandfiltr.com/files/file/80866168767.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/xalazakesixi.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/dezoverefunovizonaman.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/51748689088.pdfIn PDF document text
    • https://raljob.com/userfiles/file/12154674242.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/fewelipozifepawovef.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-4/20210904182335476631.pdfIn PDF document text
    • http://cartopack.be/Images/file/widokuxilagunobil.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/4d0ddfbfe1588fcda7684dda150ffd22/27503704711.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/vewodavurarojejosenurum.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/5370168102.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/34652031037.pdfIn PDF document text
    • http://sudeoksa.org/userfiles/file/20210921154814.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/786931e3d97b7155420eaf52eb8f7b9b/noposovetegavu.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/24093729376.pdfIn PDF document text
    • http://namngonviet.com/user-/files/foripanakipopadulim.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/pasanukixikidonu.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/72e9f392239788060c08752331dcdf4b/ratakiweti.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/51545899353.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/wibadafezozomizetagemirad.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/54441728311.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/jozomimudefitojav.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/90867271536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+read+whatsapp+database+crypt12+without+key+on+pcPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2B 11260 bytes
SHA-256: 15555b62ef98e59b10e4ecfc34f156581ff48c34e3f92864eb67221de1dff443
font_01_sfnt_off0000e87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001008c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008C 17828 bytes
SHA-256: c1aba8017f4a1bb26e53435bb145db66c652ccaeadda015e42928a2f34750118

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