Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b72c0555c13a10…

MALICIOUS

PDF

80.3 KB Created: 2021-03-29 03:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be0268ffe550fcb18231dd4215241820 SHA-1: 11245d4c6fafff4aa58f0b4d3aa6bdae7c51196e SHA-256: e7b72c0555c13a10d8ba075301efb448a4c7bb12684dac105d143746e4776f8a
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-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://jottigo.ru/wix?keyword=ramen+prince+guide PDF link annotation
    • https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/mozodatowinozif.pdfIn PDF document text
    • http://zofugef.mypressonline.com/knights_of_columbus_4th_degree_regalia_change.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_60592205a90dc.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/autocad_viewer_download_64_bit.pdfIn PDF document text
    • https://duxuxapuxud.weebly.com/uploads/1/3/5/3/135332588/pemazal.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/96771199552.pdfIn PDF document text
    • https://mubisajapesufu.weebly.com/uploads/1/3/4/6/134620746/568fcc3043740.pdfIn PDF document text
    • https://rixogeki.weebly.com/uploads/1/3/4/6/134693266/varizimug_wobudile_basoxusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428062/normal_6000041e4ba21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408991/normal_600e2f53e1000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_5fe64f8a7bf82.pdfIn PDF document text
    • http://vawabipoxe.sportsontheweb.net/diagnosis_asma_pada_anak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_f2ac8744811a469889509a9372ce45b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fixararololu/css_formatter_for_sublime_text_3.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/multisensory_vocabulary_activities_9-10.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_a3c3d51186264d49a729ed182c2538f7.pdf?index=trueIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_67de2097a0d3443f91b1430ae91d2da3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sixolose/angular_ng_template_let.pdfIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_c9dcb2fdeb314ebcb636bb3f2b026fa4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patotale/can_you_be_fired_due_to_covid.pdfIn PDF document text
    • https://3b9c8e93-52ab-41e8-96f8-e5fc639bf6fa.filesusr.com/ugd/fe3ccd_817f95e929c6426a8eb1eb384a90cdf0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lulelepese/onboarding_checklist_template_shrm.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_off0000fd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD64 5188 bytes
SHA-256: 2f773db5aaf4b487663593448fc3ed9644652fa2c679d25f4006356a39890c1d
font_01_sfnt_off00010ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 10868 bytes
SHA-256: 025a2a540b8dd131c78fc7d6d9e857cf9aef8ba2cb3f2a1028a200468debf687

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