Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe6c55969a412f1…

MALICIOUS

PDF

77.4 KB Created: 2021-04-26 15:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9cc8b64c9eb89aa5799090c16bf056e2 SHA-1: 5560b80b6467194914c087d98508720135b2752d SHA-256: ffe6c55969a412f1ef91db89f55796ea3c9cbb3d872b14d68459d11c2f09fe80
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 0.9997

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=how+to+find+original+photos+in+iphoto PDF link annotation
    • http://idealicait.site/46767486644y4yex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_6052e265e1c3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_603f47ea017d0.pdfIn PDF document text
    • http://6gusevshop.space/difedebusik9cpfk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459937/normal_5fe597b114335.pdfIn PDF document text
    • http://jirobanu.22web.org/why_is_transformational_leadership_important_in_nursing.pdfIn PDF document text
    • http://xotizel.iblogger.org/21597119392.pdfIn PDF document text
    • http://komarovskii.xyz/ravofnehye.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480397/normal_5ff5e83639221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492593/normal_602dad85b7738.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469849/normal_600609d26b69e.pdfIn PDF document text
    • http://lujedovijoluje.22web.org/speech_synthesis_markup_language.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_60436738f124a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekajawud.epizy.com/loctite_648_msds.pdfIn PDF document text
    • http://tunojaw.rf.gd/apple_picture_coloring_sheet.pdfIn PDF document text
    • http://filabobis.epizy.com/hollow_blocks_manufacturing_process.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/mother_and_baby_drawing_images.pdfIn PDF document text
    • http://kimirukuku.epizy.com/casio_aw_80_price.pdfIn PDF document text
    • http://lulovijolezon.epizy.com/certification_iso_9001_version_2020.pdfIn PDF document text
    • http://tiladolukix.rf.gd/napik.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_off0000f2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D0 5356 bytes
SHA-256: 16203bdbec3b1986112c075290e2b33f3bf7aac387779d39d732a301e7417f5b
font_01_sfnt_off00010514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10514 10976 bytes
SHA-256: e12429ba3cfa1215a0fbd3d3ca46ae08f70051ad3532904da4bc91b951287891

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