Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e0d1810370143e…

MALICIOUS

PDF

92.1 KB Created: 2021-08-21 12:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e97a272617fc88b6ebf224b635481647 SHA-1: f0f461d68213632541e81e2c112cfbbcd6beb587 SHA-256: 76e0d1810370143e5db45bb3f71b970671e2f1b3b652bb3621aba1e7e86ffea7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 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.
  • 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://infrive.ru/uplcv?utm_term=download+dumb+ways+to+die+original+mod+apkpure
    • https://wrd13.com/force/file/jewavivibitesadomomimig.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/pumavixabuxuzo.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/juaj84so8jq53mdbg8opm544jr/nelejosovalokubitubela.pdf
    • http://matsusushionline.com/uploads/files/tonipimevibosowug.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b298323875---90524530776.pdf
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/wiradibizifavu.pdf
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/xinogodosefebuli.pdf
    • http://lnianemarzenie.pl/userfiles/file/gutipekunibefaxaz.pdf
    • http://szao-spb.ru/images/news/file/selekawup.pdf
    • http://webinaris.biz/ckfinder/userfiles/publics/files/62843921268.pdf
    • http://tingyi-bnb.com/CKEdit/upload/files/taverasubeno.pdf
    • http://happinessgown.com/upload/users/files/27620217874.pdf
    • https://rallstarawards.us/nbloom/fckuploads/file/mawaneluparajisom.pdf
    • http://alisawedding.com/upload/users/files/popukabadiludibewanofibeb.pdf
    • http://icwest78.com/clients/67591/File/95175816840.pdf
    • http://pngroup.pl/ckfinder/userfiles/files/sefikiwerenuzumiziwuduta.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a47d2c52d---gofoxixinibupapexememifox.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ba06669b1---sizixagaj.pdf
    • http://hainfelderteich.at/kurajanogekorop.pdf
    • http://www.motocams.cz/ckfinder/userfiles/files/37785461060.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9de75d802---18794336740.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8f608cc99---dagodedujenuxudezaxe.pdf
    • http://wamer.org/userfiles/file/bebukaroke.pdf
    • http://xboxheerlen.nl/userfiles/file/15718624199.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed93.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 16792 bytes
font_01_sfnt_off000105a4.bin
439f91fc52918ec11de7c10fc66f42d556e3ca0baf24f0cec7590a9fe4e8f18d
pdf-font-stream PDF embedded font (sfnt) at offset 0x105A4 16392 bytes
font_02_sfnt_off00011bcd.bin
1eb558290a57f60ddeb452afe4039a5fa50dbe94da4e0881e64d85eee4c94962
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCD 16828 bytes
font_03_sfnt_off0001476c.bin
aa02b81613a5f425451be8f57d278b7c600f36c813444f14fae95a4ccdd6c0e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1476C 11268 bytes