Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3929a5cfc114cf…

MALICIOUS

PDF

132.2 KB Created: 2021-08-05 20:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 65443897922e0cb33ba30cb6d061126d SHA-1: 3a90df8db516d8a91ef9d145f9f4df04959d834c SHA-256: ed3929a5cfc114cfed78049147ef2f949e6d81fb8214d5e5c19ee4d0c7aad97a
184 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and an IP address, suggesting it's designed to redirect users to malicious content. The presence of multiple 'link farm' heuristics indicates a tactic to distribute malware or phish credentials through a network of compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://buildinggodskingdom.com/webcms/file/pemisumofeporopapi.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a547efcbd02---faxalesubuf.pdf
    • https://arnetbilgisayar.com/upload/ckfinder/files/mogepogefufumitisopumo.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/j64fmeemcb5dchq8dennh7jp55/wobidadobituj.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2b52fa7c4bc4983993bcd56de9cbb877/33553739672.pdf
    • http://wedding-ideas.ru/ckfinder/userfiles/files/97438547489.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/u2ul6bb4qj5fs0t6mulf5tvh86/mazukizup.pdf
    • https://kanat.com/upload/ckfinder/files/38551719215.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/sogifeniwinimarekovawir.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/siberubinokezajedanuz.pdf
    • http://bclgrouptt.com/userfiles/file/28493042945.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/7msdkmf3oh6jak9mpfs726h9o4/juxejafare.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/q9tbuorm145k2bkgb8m843hn14/50807434242.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16082e2f7a72ed---kaxolobesolosipetosowixi.pdf
    • https://www.natursany.com//ckfinder/userfiles/files/72411403656.pdf
    • http://inspirationforexcellence.com/clients/66491/File/65734137146.pdf
    • http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/78855715193.pdf
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/sevavetojipipovekimober.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8d7c1342d---83481357576.pdf
    • http://shmgec.com/Uploadfiles/files/77450133301.pdf
    • http://fullx.net/files/14284893223.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/e78220f6c5e47982888d7d1eb17fafae/jasutarolalujogaz.pdf
    • http://sanphamhanquocymy.com/uploads/files/98938269709.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/1e8095ec70db96055ed37020b9ada11a/7165267109.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7cf85f0f8---42455193565.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=is+microban+24+safe+for+cats
    • 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_off00019d00.bin
9baf6c1b32f6e22d1b740fa4f8a87b970aba094474e752aeb9f44dcf5999dfc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x19D00 20724 bytes
font_01_sfnt_off0001d08e.bin
dce3bfe2ca96873d74b48ec951ce5d9c5ffb3e3dd82b15bae992c8850f5a85f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D08E 10740 bytes
font_02_sfnt_off0001e956.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E956 16792 bytes