Malicious PDF — malware analysis report

Static analysis result for SHA-256 031492de5e2a415b…

MALICIOUS

PDF

95.6 KB Created: 2021-02-04 08:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b3005a4e7c22b998e82973aea4dc15b1 SHA-1: 665f563b6adf33d4cb6310fbadc142406d85878c SHA-256: 031492de5e2a415b4886cf670bc9d6d7c64b4f49129e600880c4ba26ff245c7c
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 0.9996

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://baarspo.ru/aws?utm_term=palamedu+jallikattu+2017+full+video PDF link annotation
    • https://cdn.sqhk.co/dedizozife/jihQleQ/escape_games_online_free_unblocked.pdfIn PDF document text
    • http://kismykeitio.best/smd_components_footprint1q1l8.pdfIn PDF document text
    • http://indital.fun/knife_spine_worksa4lf.pdfIn PDF document text
    • http://smeh-mif.space/plantain_farming_in_nigerialg6l4.pdfIn PDF document text
    • http://socialwave.me/ropejovovtiwzv.pdfIn PDF document text
    • http://igcopyrightverify.com/cinetica_quimica_exercicios_resolvidyixj3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_5fd2c02c3a061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_601b2a04a09c1.pdfIn PDF document text
    • http://kernig.online/gozetamizuxifoax7y4.pdfIn PDF document text
    • https://difanewoxapazu.weebly.com/uploads/1/3/5/3/135321324/eb3a10.pdfIn PDF document text
    • http://idealicait.site/just_draw_level_22_erasevgiep.pdfIn PDF document text
    • http://picsonair.com/zotijisexolivatadupedarso7v.pdfIn PDF document text
    • http://roskycnmx.com/staten_island_street_map1qsaq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fef19a56d01d.pdfIn PDF document text
    • http://tesar-krd.ru/tanojimizomusamemilrzum1.pdfIn PDF document text
    • http://idealicait.website/worksheet_11.6_subjunctive_moodtq1vf.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/qjbEjjS/ridavibebuxosejikitivu.pdfIn PDF document text
    • https://keromarire.weebly.com/uploads/1/3/0/8/130873863/kezimamusitura_fekilesare_fowapeka_mikezedapevikin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DA 5164 bytes
SHA-256: 2e6f00c0dc6b6f60a6dbbf53b27849218e6da367a622bfb8de6fdeb87ff798d9
font_01_sfnt_off00012a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8B 5912 bytes
SHA-256: fbcac15001a9bc5c2fc12596f67d4e8f91e965ec366a59c9c51d41e851fe11f5
font_02_sfnt_off00013d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4A 11084 bytes
SHA-256: c2d734f2c3dec0a78fc4ed523fa9e17b11af8a6e32f1739b89a61c13a4da33d5
font_03_sfnt_off000162a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162A3 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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