Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a75c8bfb62b5a7…

MALICIOUS

PDF

76.4 KB Created: 2021-02-28 03:05:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 943e794c8dbb1e0e6669e9588d6834fb SHA-1: 9398f2c654f0e670b1e2b09e3e9f0542bdc3d5ca SHA-256: 66a75c8bfb62b5a7090ebad4d0bc19a33c24a3cc3f7ff4040b77ef2f0d361cee
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://crophysi.ru/wix?keyword=how+to+remove+midas+touch+curse+words PDF link annotation
    • http://zixosoliga.iblogger.org/quickbooks_inventory_cost_report.pdfIn PDF document text
    • http://dekabizutetan.22web.org/potakogowuzumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481528/normal_601609a9a10a1.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/as_a_man_thinketh_book_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_5fd3d70357617.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502833/normal_5ffbadc80e13e.pdfIn PDF document text
    • https://lelebozo.weebly.com/uploads/1/3/4/5/134578107/zojusom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488329/normal_600ba89548d39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_6024ef8983e21.pdfIn PDF document text
    • https://xowitato.weebly.com/uploads/1/3/0/7/130776358/625bce81746d31e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5feaed2a60785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_5fe782198781a.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/beduromadaxidapave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420597/normal_5ffdb5df3439d.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/wugogasurupejoled.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504788/normal_5feeb6e00d74f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mevomum.epizy.com/19543137456.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/20972676204.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/vewafuzare.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/doranijuluwazudizukesod.pdfIn PDF document text
    • http://voxavupe.epizy.com/39140261219.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15A 5036 bytes
SHA-256: 5a008013985a45557f0114b3cfc5db77279036a6e6f333c54c397ad964be5baa
font_01_sfnt_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 10396 bytes
SHA-256: ca43a778f6d35e01b2828e60193d74b100ab07c2d67c2b060d9a2e6a594dd76f
font_02_sfnt_off00011628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11628 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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