Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d5672b5c90bb1c…

MALICIOUS

PDF

90.7 KB Created: 2021-08-05 07:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b5ad3a393cb22a1b095e25831127904d SHA-1: 4952db4f2554394509a39f5eeef88a6e3f41c0c6 SHA-256: 30d5672b5c90bb1c151392946ac479f7aa7aa14d64db9ba976e9631918005e30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware through these links. The presence of link farms on disposable hosting and compromised CMS uploads suggests an attempt to obscure the true destination and leverage existing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077c8f89dd8f---ronopatej.pdf In PDF document text
    • http://www.biotanika.pl/upload/file/jevatupadoxodepesufofo.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/52lsb4flk46gjubmd1rbt5t7v4/nolokoliduninuxutewo.pdfIn PDF document text
    • https://laser123.com/geektic/files/24460692964.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/zufox.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/o777t311snqkcdj1ep1n5jhgq8/ribopisafufozupe.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/zivuzutoba.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e19aed77f---bopamodo.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/69c568f0b634ab3821cae238ea40a97d/52080626515.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/47666547701.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/48838511733.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/vevip.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/40848821488.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/rizatufamukekabebuwezimaf.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/38cf537d45644b5e3d4d7b6b41a7594c/tofebobiwaburulalofasa.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/a083da7c6512b2edfee2bafdeb2f1ba5/tififinusajudotul.pdfIn PDF document text
    • https://nadinerogger.ch/userfiles/files/jijawogijapigulokuzo.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/92273610449.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/89108712822.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/64917379018.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/4292784cafb61ff3447521bc80f1f727/80863258180.pdfIn PDF document text
    • https://edarky.net/data/file/wukafodiletedekewavananap.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/4k4f9ujqihqijn2bbih4fe1j02/53516597418.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=steve+harvey+straight+talk+no+chaser+how+to+find+keep+and+understand+a+manPDF 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_off0000fad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 17168 bytes
SHA-256: 8b1db105bfb29fb1192aba3dea1f8676d599b9cc424977cd82f07b5762772efa
font_01_sfnt_off0001275f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275F 11600 bytes
SHA-256: cbba3cc0bc24e39873745b404289ff5a956ba271286b7989473c309a1416b530
font_02_sfnt_off000142a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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