Malicious PDF — malware analysis report

Static analysis result for SHA-256 501836310feb9e78…

MALICIOUS

PDF

86.8 KB Created: 2021-08-06 13:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3a4170165ed89811c6af5101f33604ce SHA-1: 3c974be84d5f58f1c1434ff6670859c457069ecd SHA-256: 501836310feb9e78d9d2e698431ccc2eb5daa5eeb3fc812a471f3a9a4cd88aa2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to potentially compromised websites or disposable hosting. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://blackhorsesc.pl/userfiles/file/71469127677.pdf In PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093a2799fba6---gowufefujeberajuxil.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd286a5f19---9932650114.pdfIn PDF document text
    • http://chineseclothingonline.net/File/pomijagewimininufamakig.pdfIn PDF document text
    • http://jump360.co/upload/files/20210715145811.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/8987692725ead05fbbfada11cd0bef0c/rujuzid.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/wurugifonugazede.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e3ba0d9bd---59928398633.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/97cbb0c2f31ff786893f78a12648ded7/wolojemixiragekaxa.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db97e2755c2---1496186688.pdfIn PDF document text
    • https://majubesar.org/contents//files/21650210587.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202106/file/94465980150.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/ec73ee9e4b60958f34e88ad1af7eb009/sabakosesirififisuvefoz.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/xipazonimulofo.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/4943421146.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/9304bb3cfb1d88f63f196357ee4b1ec0/kusuket.pdfIn PDF document text
    • https://ghnservizi.com/file/2080790775.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/23726110938.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/65d981a965b6946b0b615cd7ad66ad67/63777662742.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098074aaf63c---kofimaginevozeruvifunosop.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/67867214398.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08b6dbbd0f---72976215088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+hook+up+bose+901+equalizerPDF 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_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 18240 bytes
SHA-256: 7d9fd34983649ce48f8c8c5c25abdd03004f76e6941813a4e6765d64b67d7c5d
font_02_sfnt_off00013310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13310 11204 bytes
SHA-256: 747b00feb822298cf5c3593fc40c7adf85b614cb05a9bb831f8f03fe0c8bbe5c

Open this report in the interactive analyzer, or submit your own file for analysis.