Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e84fa7a45c24872…

MALICIOUS

PDF

78.4 KB Created: 2021-03-14 10:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e2fad233c3f9844e94369e5c253ecea SHA-1: 981b8ba9b5bdaab8587443b50159a8ebec45fc48 SHA-256: 8e84fa7a45c2487201ea89da838b6f7c247939fc65d453ecb7a0dbb5ccf615a1
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/award?keyword=denotation+and+connotation+examples+of+words+pdf PDF link annotation
    • https://cdn.sqhk.co/wekaradukuve/Jichghh/89600627245.pdfIn PDF document text
    • http://epipog.com/mugilefakijoteji4ohuc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387433/normal_5ff69befb2344.pdfIn PDF document text
    • http://cccckkkkkdd.space/72252191768i9erb.pdfIn PDF document text
    • http://jefuvumerusew.getenjoyment.net/jj_benitez_caballo_de_troya.pdfIn PDF document text
    • https://cdn.sqhk.co/donaxewon/phe7ieY/57672326180.pdfIn PDF document text
    • http://grenkasalo4.xyz/android_adb_run_apk3vkxe.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/city_fighter_vs_street_gang_apk_modz5d6b.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/jehaeje/indoor_archery_world_cup_2017.pdfIn PDF document text
    • http://doordash.fun/sozemeveboponnblqq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417809/normal_60344290463c1.pdfIn PDF document text
    • https://cdn.sqhk.co/japuwejede/icjgjer/48536117172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_600a09f8c613b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_600fed2a78f1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498971/normal_6031128294082.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_0fdd09f9099a4e178dec2108a5496f53.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_1514171bfb7e4d518fafefa63ca2acb4.pdf?index=trueIn PDF document text
    • http://gowepuxajotezo.onlinewebshop.net/how_long_can_fleas_live_without_air.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/12480566806.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/8644422674.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_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 5460 bytes
SHA-256: 8dcd57defeb9b54232373eebd4d65f15cba9db79f20752fd60df9488c847e883
font_01_sfnt_off00010684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10684 10832 bytes
SHA-256: f22c4e84bdbd94900f3951e3faedcee15ce26c26cd3e8561f290675b1c954b4a

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