Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed8a7e680cea8bd…

MALICIOUS

PDF

81.7 KB Created: 2021-06-28 15:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36291e80fe82b86ca6afa86ccf2361c3 SHA-1: 9aa8b70a6beeb1c1b47fb93feff273f545209479 SHA-256: 2ed8a7e680cea8bdcacab90c4a9c416d76f734ca2dcb8c2cafdf8269fc547534
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggests it's designed to redirect users to malicious sites. The primary goal appears to be facilitating the download of further malicious content or directing users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://philabc.ru/uplcv?utm_term=dairy+refrigeration+systems+pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e20a0c05c1---lipaxezewapewazeleraz.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/5d26b422e5a7e57744a83de3319969c1/54414891254.pdf
    • http://clinical-pain.com/pds/userfiles/files/tumabutara.pdf
    • http://edu-family72.ru/content/images/uploads/file/pejelize.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608288c0ac955---zimoluzetedobawimibufuvo.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/3aa47d069697184e67620f82ef5e6063/kusokanixafozawovuviwa.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d221cde1f4d---zefif.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5fc6cc9e3---89629098356.pdf
    • http://cardealer-space.com/js/upload/files/81112929701.pdf
    • http://yuha.be/_files/file/bozutorodavisisepe.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2b77078f4---fotonivefaroxakun.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868c64d1342---83804063975.pdf
    • http://barcelonasixtytwo.com/userfiles/file/tukarubodizolidukakenibas.pdf
    • http://grandchainfamilyfoundation.com/clients/85333/File/laloveran.pdf
    • http://kubabus.cz/novy-web/upload/file/81152880797.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/94ec11af056604331e4b8ca9e79ccf60/sitamumimu.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ig908i0o7n6qirfgtk0iu7l11u/zadefirejimogetofoniv.pdf
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/marajofofesalor.pdf
    • http://bio86.fr/fichiers/44489489679.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abb474c56ee---94965367704.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/puco05ptqap1vahe5c7hjlbc44/sipubupuragejevogoliki.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/75de77d35a78f7c68c1e996df12ca58d/60396620793.pdf
    • http://timebank.ru/sites/default/files/photos/pagefile/pudilefi.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/933f6162630422c2646aa09c977ff567/repizuvosapuviw.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e13c1e48fd---xoremelinibusamuma.pdf
    • http://caramelitos.sk/files/xiborifulaxuriti.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dafc.bin
8ec32b79868e7b1797bc08ee193df3d93ce7a163da761410320f4c782f262734
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFC 17336 bytes
font_01_sfnt_off00010830.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 16792 bytes
font_02_sfnt_off00012047.bin
e1d9ba90404fb4b8f1dff4d4222fcb3a1d6ce9ea5767b2aba99cb7d5f4ed6193
pdf-font-stream PDF embedded font (sfnt) at offset 0x12047 10908 bytes