Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d06318ed770031b…

MALICIOUS

PDF

90.7 KB Created: 2021-07-08 05:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 10448e122b42a29e3b3c04a775d03ef0 SHA-1: c23de528adb68cf09f2d7c9294c65c9fcde50152 SHA-256: 2d06318ed770031bf2502facea0ae85412f2ad46e49227172da5353868ba3517
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous compromised websites, including those hosted on disposable domains and potentially malicious WordPress uploads. The presence of external URIs and link farm heuristics strongly suggests an attempt to manipulate search engine rankings or redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=in+map+east+west+north+south PDF link annotation
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/60704638984.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/famebosidizan.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084ec4c22e5d---67959924002.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d31045c5855---doxobaromudiku.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/13612033036.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/f202dbc642d1510501df2f58389f70ff/47239772018.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/5u77kia8jb5u8crqsim5inof07/bezawizanaxofeju.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/19092273794.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607524d5e58ec---disuloxe.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/0018a948893b1a746f939fceb0e392d2/90783624578.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/sazorew.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/37880015931.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/06d69c36ea3ec592ac5ac23419a966ab/44233978080.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/taxidutariwukebivesitajoz.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/207bf31560b24f0cf96411659ee40ba7/gewarexejudivagakabower.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/dofilalanebamakakijufed.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/vjbjc2q6r3arrtq7n5r38j08ad/kopimidesugoluwuso.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/19719363673.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc222c86b71---xomagalotugu.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/6072948272.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/belumofasevefosase.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/14889918966.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/af7ed943569b6fd33229b4b5c6b1ada7/jiroliruniwib.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/t6nglh5nhl1s0d2h9epq33i4s5/zisituzodufuve.pdfIn PDF document text
    • 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_off0001006c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001187e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 17352 bytes
SHA-256: 599349a6ff0f29244103a4a35e3bc002d4b52a42b9655b13f417a1eba9bcd4d6
font_02_sfnt_off000145e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E5 10516 bytes
SHA-256: 46150de0fe3dbe0f7a085a9869bec4ba8afe919f85cfc3cacef7e6473f7c16e2