Malicious PDF — malware analysis report

Static analysis result for SHA-256 707cd1cff4409bae…

MALICIOUS

PDF

83.2 KB Created: 2021-08-17 17:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 343ccdcce790ae2d98362d59475930b7 SHA-1: 9572c786d3c3dddd261c4b1fb22503886840ceed SHA-256: 707cd1cff4409bae24bcf87e1e6bede669728dae621b3f7c3521c0b9977bd04e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, embedding numerous URLs that point to compromised CMS uploads and disposable hosting domains. The primary goal appears to be directing users to external, potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9398

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d3c65f57c2966e7f336bd4a3d3b3ceda/kujirure.pdf In PDF document text
    • http://indel.sk/userfiles/file/gimigoresowoniwivamare.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/41706624761.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/69ba18e965c43a8ffbfce7a5506cd7d5/40602300307.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/96970111610.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/1358978484.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bac14a0ff---16386498388.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/tuzerobubebuxuvasulibavo.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/6826901423.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/jomajifanuninikamoker.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609461cce7f50---jugetiwixomamuxidugesa.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/babosojakogim.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/77618774978.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/13569414773.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34ba10f0a9---kazubezunobowoj.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/74fcf4c8099517cf3f44a9fff72a1aab/53507418827.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/63383393749.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/99738398369.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/12254943367.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/d3gtv8qdnaock65q8su07h4nm5/galuwupivoroliw.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/10024285533.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/61008244968.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/umirhfvlr9m3sufbmdpjrka65t/237528092.pdfIn PDF document text
    • https://jambumanis.com/contents//files/42119878162.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=discurso+para+quincea%C3%B1eras+cortosPDF link annotation
    • 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_off0000efb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C3 17612 bytes
SHA-256: e0a620a8dab38a620b6e4a924d797576be2cf4d14cf6b1334760b090b337912f
font_02_sfnt_off00013454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13454 10776 bytes
SHA-256: b8fa6c8651c3101e30459e2c1f29cc3b4af41e3f56e1ebe7e1c301be8b482f48