Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2efe7e7e608c54c…

MALICIOUS

PDF

94.1 KB Created: 2021-09-19 10:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1227a22435401f780f3dcf7c01439858 SHA-1: 52d525d1e8103b5ae8a83e86265baed18e00e4a9 SHA-256: b2efe7e7e608c54cfd7142146e19cbb7cfedb7d0d3a43433d7dabcee5acf4d24
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a large number of external links, many pointing to compromised CMS upload directories, suggesting it's designed to redirect users to malicious sites. The primary goal appears to be phishing or distributing further malware through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=how+to+breed+a+gemstone+dragon+in+dragon+story PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b1a62b9cd---74218571976.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/6823203714.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e2b9ee20f---50717418245.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/25270663010.pdfIn PDF document text
    • http://ccsl.asia/files/7659516551.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/pakasigigezudibijukafogon.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469c29d5888---buxuxipabulidimovag.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/70902112393.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c5136b7e2---redejetenisobupu.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles/file/titimawolemopemu.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146c10205175---55276945998.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/rikilonuzadamimipikafi.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/xebobaxogu.pdfIn PDF document text
    • http://erago.cidees.com/uploads/files/75332204622.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/63726274992.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/52893105282.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/wurosivakumadesaliz.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac44c424bd---ruriwenukimatupidapefog.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/37387632989.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/98332714281.pdfIn PDF document text
    • http://vanhacollection.com/images/files/voniwisilinovakezakire.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/37171934064.pdfIn PDF document text
    • https://maintogelonline.bet/contents/files/ribevefilasefodet.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://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_off000104bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BD 10876 bytes
SHA-256: b31b563606e37968fe717af1305dbdab4196759f25c62f8ba4a95bf7773ae404
font_01_sfnt_off00011db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB0 20256 bytes
SHA-256: d94725cb9483c109aea851e87e146557b54629f15815cc70ba339f5e6466e1cf
font_02_sfnt_off00015215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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