Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc8f8eb8d2960e1…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 11:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c03d806ba0e2d7f7fc4d3b20c4caf676 SHA-1: c076e205d4a9d94cae2f11e149078603135eee7f SHA-256: fbc8f8eb8d2960e181376652bff973fa057c732642b321c3cbeee49ae28b37ad
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 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://baarspo.ru/aws?utm_term=akhiyan+2+song++mr+jatt PDF link annotation
    • https://cdn.sqhk.co/kululojilo/xggibRl/grocery_shopping_list_template_free.pdfIn PDF document text
    • http://kigenavozos.iblogger.org/guide_rna_design_online.pdfIn PDF document text
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/beremubizawen_befizozanox.pdfIn PDF document text
    • http://vibawukukar.iblogger.org/football_match_schedule_2018.pdfIn PDF document text
    • https://lokuzovitopoz.weebly.com/uploads/1/3/4/8/134871506/fafejizuduwuvejorov.pdfIn PDF document text
    • https://senevabitup.weebly.com/uploads/1/3/4/2/134234896/bef5c049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_5fc630da4d526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489247/normal_5ff9282421c35.pdfIn PDF document text
    • https://valabokewem.weebly.com/uploads/1/3/5/3/135311070/9128153.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/iPlgfhb/zokinubex.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/a3904e173f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuwoguki.epizy.com/android_studio_google_maps_api_key.pdfIn PDF document text
    • http://vijesir.rf.gd/rugovasedarej.pdfIn PDF document text
    • http://sunuwib.epizy.com/mep_company_profile_word_format.pdfIn PDF document text
    • http://xogonat.epizy.com/cartoon_couple_wallpapers_free.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_off0000d4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F9 5432 bytes
SHA-256: 740e142a5bdc99783519ac65affca99770d44bbc022d71d4f20ab0fc396dd7c1
font_01_sfnt_off0000e754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 2044 bytes
SHA-256: e8def34ef7fa1cd1e737aa53281a1ad4be732a20e453453846aa670fb207f4af
font_02_sfnt_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 11704 bytes
SHA-256: a342bea5c7443ac226246ade60f60cc318e34a29a2db84f13c8396dec2113190

Open this report in the interactive analyzer, or submit your own file for analysis.