Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb153ba7811fc2dc…

MALICIOUS

PDF

78.0 KB Created: 2021-04-04 02:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3a9c9735c973bd512aa834b7b13d67ef SHA-1: c658f562f8a9aa7f701aa0993d36c10435d2a1cf SHA-256: eb153ba7811fc2dcd2bb800c2959878bb3dbabe7d372836afc2411bc8d2dd302
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 0.9991

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://pelibifir.ru/wix?keyword=pickerington+north+high+school+football PDF link annotation
    • http://reduslimitalia-official.site/41356392342owfdq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490122/normal_603b3a02eac6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_600a95996eee6.pdfIn PDF document text
    • https://cdn.sqhk.co/rivinodati/jCPhfhf/lancer_theme_deltarune_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_5fe68c7147bb4.pdfIn PDF document text
    • http://robolab.one/fastest_way_to_rank_up_in_warframepumvs.pdfIn PDF document text
    • http://ecosbor.net/coleman_powermate_5000_partszaiaf.pdfIn PDF document text
    • https://cdn.sqhk.co/rinovizifim/mjdihBn/99934814768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_603c17d41ede9.pdfIn PDF document text
    • https://cdn.sqhk.co/zowajomi/fpDQiem/dinamomivusitikonilabobon.pdfIn PDF document text
    • http://retys.space/how_to_reset_tp_linki1sj1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_60612a6c900be.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_604647c7423cb.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/titadudk9kca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_60145de80c790.pdfIn PDF document text
    • http://ryduslim.website/135484134402lxtq.pdfIn PDF document text
    • http://health-top.ru/craftsman_lt2000_model_numbero8vtz.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/cVgcjb4/sharpening_a_knife_with_a_ceramic_rod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_6011f1424677d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366395/normal_600905e151dbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483070/normal_5fdea76412ed6.pdfIn PDF document text
    • http://greatmasters.biz/55954994741y5f5s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/sumodaputaf.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/92713174411.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_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 5348 bytes
SHA-256: 13054fc677aac673d76ddb5b49cefc3b8cc4d8be0fdaf532f095855c6a6b9e1a
font_01_sfnt_off000105c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C7 10776 bytes
SHA-256: ca362516a58bee03c91b857131516fd2f99e1a3054399fa4287b9af4507a17c9

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