Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ffc422873795425…

MALICIOUS

PDF

78.1 KB Created: 2021-03-22 04:12:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6b2489e70d8b5b6681dbde9ad8f26bfc SHA-1: 3bdb42e9b2e2c4706a162e74c92b94c6104d1e99 SHA-256: 6ffc422873795425abbc4930ba2e52ef6374458b5b5b06a68be532fa74ba736c
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 0.9992

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://lozipotod.ru/strik?utm_term=hancock+graham.+fingerprints+of+the+gods+canada+anchor+canada+2005 PDF link annotation
    • http://piwifeg.22web.org/betora.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/does_huawei_nova_7i_has_google_play.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417808/normal_5fe3dffbc68ee.pdfIn PDF document text
    • http://gesufumepemu.22web.org/clear_cache_android_8._0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393635/normal_5fcdc3da1a694.pdfIn PDF document text
    • https://cdn.sqhk.co/zoburawava/ejg5Ggh/dimapilegikavaziwed.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/josuzagunokosule.pdfIn PDF document text
    • https://cdn.sqhk.co/guzelatolina/89zhc7z/fumiwovifubetowoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5fd200ddafb96.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/68621090776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473039/normal_5fda2075beaf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459470/normal_6001d627a6935.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_324ddff90f784333871f1a26816a1052.pdf?index=trueIn PDF document text
    • http://bufiwebejavika.epizy.com/ziloza.pdfIn PDF document text
    • https://921790ca-7b53-43bd-a25d-275d6f056404.filesusr.com/ugd/9d24cb_27c0e3f5431a4f8c944678e4e3f8d37d.pdf?index=trueIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_bf8df0a9bd4d4093ad6e579754452e33.pdf?index=trueIn PDF document text
    • http://jabelakejirer.epizy.com/72990933515.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/96309837270.pdfIn PDF document text
    • http://bajobakokela.epizy.com/ccap_colorado_income_guidelines_denver_county.pdfIn PDF document text
    • http://vagoposejexuma.epizy.com/tapexisukumetebobili.pdfIn PDF document text
    • http://kimirukuku.epizy.com/pitemipubazutowolanavuje.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_03cdf8d1041d4f0a871473312f5ba389.pdf?index=trueIn PDF document text
    • http://likasiz.epizy.com/66798827576.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/gufewanuvepuvofolevuw.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_off0000eff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF5 5992 bytes
SHA-256: 342f87316f07dddd940a9e189397ef72190f1faa9f493f1b63345acf9016ed9f
font_01_sfnt_off00010440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10440 11260 bytes
SHA-256: 0848dd2c0c5a7ecc9fcec2d2e49b0a6e551c7ac35191464bac257f00ca4031a0

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