Malicious PDF — malware analysis report

Static analysis result for SHA-256 561e14ed4b99739d…

MALICIOUS

PDF

74.1 KB Created: 2021-09-12 15:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4e1affd82a08e74fc1c33a68f19ceb54 SHA-1: ce05a2ed1c130607ea103368ab7b4e5f0465f5a1 SHA-256: 561e14ed4b99739d6a8feaf2e2f445f95366b5249c06086ca8cff929d49bf315
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://queure.ru/uplcv?utm_term=bitlife+beta+apk PDF link annotation
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/kusaxutekuwalarimevit.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/56280047832.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/gojaxuwezovuben.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69642223551.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139f5e8d531c---41758970319.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613286ec86bc0---85665816384.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/7205576290.pdfIn PDF document text
    • http://ssss-sangam.com/userfiles/file/65694195737.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/26084576972.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e898550a2---23217128633.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/75817101604.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/77798740096.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/popafarisazevopavidilojag.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8b03a2672---90909194638.pdfIn PDF document text
    • http://xn--spreewaldpension-lbben-9lc.de/meineBilderAlbertGrundschule/file/lixod.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/80781202316.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/50949227936.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/lodifod.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/zosowesirosabivonevunedu.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/2194519956.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/nikifegavekukepimuv.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/jeperuvejuj.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/tajikogesofixavelikamere.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2d26cb5c3---21487579058.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_off0000c2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CE 16240 bytes
SHA-256: 998276caa055fba0adf2646b8d1ccfa0d4bb001260c410c300523e858d6a874e
font_01_sfnt_off0000ec5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 10144 bytes
SHA-256: 28cf0569e8ca1320742d002188d124909e58ee468bb0854ea336c2d70374c0d9
font_02_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1