Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed3379dcb330724…

MALICIOUS

PDF

87.2 KB Created: 2021-06-09 14:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b4538044c00efb0a13a61adde8a35c4e SHA-1: 3484ff0bf7aa2491c1b55861b0dc33a9056eac98 SHA-256: 5ed3379dcb330724ea610210c553dc3f37cc7894c9f2e1cd2422bd8d573aa57b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of UTM parameters in some URLs indicates tracking for malicious purposes. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8874

Heuristics 5

  • 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
  • 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://laborke.ru/uplcv?utm_term=tamilrockers+kannada+movies+2018 PDF link annotation
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/134da5c219f79d9df25e240ff978709c/kuvemopolomivuj.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826f43f30cd---surigarav.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/tonaxepuf.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b59ab631b20---tixalawabolaxunepomega.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609dac1c137ee---mewebuzujabibobegon.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef37a99f1e---wabegupuwonapawasitaz.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082eec4358e1---77300855959.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/9eflo3i1kfhrpeec9ku9j9tnjd/31853777975.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe56ff33dc---keturamujo.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b447213fb---95244062174.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7013186726135f4667e43a44ed46edc7/tubixenomereribaragada.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/b1debc16d7a23b2e4326f34bafec1386/mululiwovunidixufaxazep.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202105281917255090.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4d83dc9e0---mapogu.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/a516cde59a5f23912692dc59ca44d674/41413148243.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a48ac745f---99092474090.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/69428678501.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/37c2e47136cf2a937c6992d6a98e4490/91356338443.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013a09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13A09 9768 bytes
SHA-256: 7385f743e1acdaeb39572c4da1652192388e6bbef0a8fb6c8f51560d1152d7a5
font_00_sfnt_off000127db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DB 5388 bytes
SHA-256: 286c77b21f45972b66aee2192e169ab10377920802b6e7cdaeedeac2658c0284

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