Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f988510e17d182…

MALICIOUS

PDF

79.1 KB Created: 2021-03-15 05:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 07fc1e052de16981f70cc1ea1b84484f SHA-1: 55eb0fda538574c307a3a5229a3212d281d7b53a SHA-256: d7f988510e17d18251afd625ead59af952a828ad9ca7d70897b7ce25cb1f2503
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 0.9998

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://leonvi.ru/wix?keyword=pick+up+the+phone+ringtone+indian PDF link annotation
    • http://maslovauto.ru/physics_for_global_scientists_and_engineers_volume_29l5co.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_5fd651f204cce.pdfIn PDF document text
    • http://xabisafeb.22web.org/29720688231.pdfIn PDF document text
    • https://dowozazufexu.weebly.com/uploads/1/3/4/6/134606261/tizinubu.pdfIn PDF document text
    • http://bioforcecolumbia.site/tiromezgkv2.pdfIn PDF document text
    • https://sasujenag.weebly.com/uploads/1/3/5/3/135337218/kevadodoxe-babasi.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/wijobomip.pdfIn PDF document text
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/bca532b3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381962/normal_6003dfc03eec3.pdfIn PDF document text
    • http://pedalini.club/wepaduwusuk2q5iw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414360/normal_60006cd1654b6.pdfIn PDF document text
    • http://velavedi.iblogger.org/template_boy_birthday_invitation_free.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/wimaneduvov-kawuxobesemoka.pdfIn PDF document text
    • https://tedagenuv.weebly.com/uploads/1/3/2/6/132682668/xiworema_rajilogimamob_bopuzifinewiv_sijalinilopun.pdfIn PDF document text
    • http://cosmicgig.com/66267557889278i2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_6018d84fb4f8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb1cd47-404a-431c-837e-d92761a4da24/sebesifazevod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cdd2940-336c-4d68-95ea-d2bafd1807af/6928352839.pdfIn PDF document text
    • http://bobupugarini.epizy.com/wategalujozewirosuxo.pdfIn PDF document text
    • http://bagineju.epizy.com/13157938226.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF711 5192 bytes
SHA-256: c2eea38a8f6cd6c0c516d2cef1e74eeed1a611bba38ed605cd8d16636a78b1ea
font_01_sfnt_off000108b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B5 11316 bytes
SHA-256: 396362a07a24a461b21f4132af4c3a662cc65b11f29b74ec5ac7d0d71e297120

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