Malicious PDF — malware analysis report

Static analysis result for SHA-256 034ba4e58054c498…

MALICIOUS

PDF

97.7 KB Created: 2021-03-19 03:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 950aa6a5c1d5c7efd13e3dc95d4f95bf SHA-1: e29c7efcbe649444797309b81b340e4070fd207d SHA-256: 034ba4e58054c4983f4b293e636bcf8ef44b8489ea2c7127b7a30944ddd06cf0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=cherry+tree+by+ruskin+bond+pdf+free+download PDF link annotation
    • http://googsnat.space/agorafobia_adalah30hqp.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/cibg5wI/vujewexepotidudesow.pdfIn PDF document text
    • https://dilisuri.weebly.com/uploads/1/3/5/3/135326113/suxupimobefow.pdfIn PDF document text
    • https://puxipevabama.weebly.com/uploads/1/3/4/3/134308905/fixinaxemezirugel.pdfIn PDF document text
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/7405a85909c.pdfIn PDF document text
    • http://dubifuxukev.iblogger.org/pimogokes.pdfIn PDF document text
    • http://present-mag.ru/jaxuvobu3wmur.pdfIn PDF document text
    • http://roflan.site/74071863937om4n0.pdfIn PDF document text
    • http://cadenalia.com/89690988863nzp5d.pdfIn PDF document text
    • http://xuzekamusudis.iblogger.org/metric_mania_conversion_worksheet_answers.pdfIn PDF document text
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/xakaxibakovexi.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/VWGHn39/28541222824.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/ahaJqaD/fudoruvupamatoki.pdfIn PDF document text
    • http://boburokopuxixud.iblogger.org/lajekulawamava.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemonuru/hhxieif/bluedriver_obd2_scan_tool_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19eae752-0dc2-40b2-988a-3ead9c543f91.filesusr.com/ugd/dee0a8_c5bb46f174864e97a5deb6190b36a326.pdf?index=trueIn PDF document text
    • http://rimefuvax.epizy.com/fogoxezukurugaje.pdfIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_3eac3f7402c6407c89fe9951397599db.pdf?index=trueIn PDF document text
    • http://jipidabaxepej.epizy.com/arduino_ide_alternative.pdfIn PDF document text
    • http://widumetexax.epizy.com/sepsis_3_guidelines_2020.pdfIn PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_9a4c7d5c75fe42a3abb1f0051f0b6a34.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_6339436f5ee440209ee7a43c12fdc427.pdf?index=trueIn PDF document text
    • http://denotepisijolib.rf.gd/68820052440.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E04 5432 bytes
SHA-256: 41117d400f8c984b85f49aed1500f233428680099ef9e390808337c5521c4a48
font_01_sfnt_off00015082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15082 11684 bytes
SHA-256: aa8a46ce659056bd821b5f231e9e794e2971a84f8ecebfaab53d5cbea23489ee