Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b451562c3b1823…

MALICIOUS

PDF

93.9 KB Created: 2021-07-21 14:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0f3fd19dd404e19061e758bf4f99ab4f SHA-1: d3063485db08158ec389a0a2e775429cd95f5e3a SHA-256: 29b451562c3b182347fba08232460a3703360e559c146db6dc00079175d72c75
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://my-natural-style.net/upload/files/84124594108.pdf In PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b42414ecce1---vetenir.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/39544591312.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/5srctrihgbgo80k1eerrfml0d9/pokubixoxugakafosedo.pdfIn PDF document text
    • http://www.hcc-cpas.com/siteuploads/editorimg/file/nukekebefij.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072d593e7137---1410342839.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/6e45009f5fc41522f87369092e38c84b/dibazezogirejo.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/4040426342.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/01476d7415c58579e706a9c2e098f2ed/10531115718.pdfIn PDF document text
    • http://samsung-service-center.ru/uploads/files/58773491433.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/bd5i4pjk4digq930k7n9u1ml8n/77132344413.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/makunisanivezevagugi.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160acfb72c1f01---12217730924.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/fd21d0a87bf09ec7575df4279f72d371/vifovaxubigikudizerama.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/0bea0a9a37fb55a5321696af3ee6ef5f/zuwejele.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/80546416129.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c9572252d---6400253688.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/17571391030.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc66be0785---fewolexob.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/46928681041.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9542c9be6c---89237833786.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/e103d117a438c9a46db9646dc2303d90/xijufakeb.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086d558a33e0---bisemobapixafetexe.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/2f41744f61ea9b5cb252e597cac4354b/fanuzix.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a81ec847ea.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/5175e2b1751e8098055eba0517c6f68f/27519530742.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/voxazewodukomub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=timothy+morton+the+ecological+thought+pdfPDF link annotation
    • 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_off00010b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B00 11076 bytes
SHA-256: 5efc1db3099736d5db1d6cee68f47595e55c72c373a034c0912f00338b163388
font_01_sfnt_off00012471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12471 16804 bytes
SHA-256: 106761d0493ef24b3cd0d69f5ba19e60828bae3aa8784792e6f6fd916409b820
font_02_sfnt_off00015014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15014 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1