Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89ff58862c03028…

MALICIOUS

PDF

100.3 KB Created: 2021-03-07 11:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a98008ae1269f6067bcc3c0a9fa5d250 SHA-1: 9663a2f7d304a8a0e732ce76d94f938421ffee40 SHA-256: a89ff58862c03028de4800afa78f0c662cbf277ee7dbd65074bd2c0c49b8410c
156 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 0.9995

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 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.
  • 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/strik?utm_term=a+suitable+boy+not+available+on+netflix+usa PDF link annotation
    • https://cdn.sqhk.co/sedazozesufu/hdzhg20/voice_changer_with_sound_effects_apk.pdfIn PDF document text
    • http://arthromedro.xyz/lipoli6t8mm.pdfIn PDF document text
    • http://webpost.pro/calculator_app_android_optionlr9ar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_600b8e43518ef.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/LGgjglS/poxedabuleju.pdfIn PDF document text
    • http://marketitaly.info/armadyl_god_book_osrslnjv9.pdfIn PDF document text
    • https://miroguwitofenev.weebly.com/uploads/1/3/5/9/135958286/juluwadogeru.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/JjedqeS/46363838179.pdfIn PDF document text
    • http://premiumpornclips.com/g_shock_ga_1100_1a1xqprc.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/Kbjb7tD/86039264116.pdfIn PDF document text
    • https://tebadigizowi.weebly.com/uploads/1/3/4/1/134109241/pafebuvosaletezelune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5fea005a0032b.pdfIn PDF document text
    • http://ejinaya.com/83301981060xkvdb.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/fjjfQij/boxakidozobivawekegoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fc8269235f1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/jonora/wepufulomaza.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/23183207646.pdfIn PDF document text
    • http://vokerajud.epizy.com/96768532021.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/are_trx_exercises_good_for_you.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/dual_booting_software_free.pdfIn PDF document text
    • http://pivesezo.epizy.com/blender_tutorials_2.79.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/58023376510.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7A 5024 bytes
SHA-256: 28fd165244058355830eccbacaff8e2cdb6ca2890dbe027ba63a9e1788c59520
font_01_sfnt_off00014eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB3 6124 bytes
SHA-256: ede7cba4f5746691af9254810e7724b957c57288c081cff5ea53426cb60ff67b
font_02_sfnt_off00015e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E9A 10752 bytes
SHA-256: 683c6c30c95f6708219fa4a7fbf45b1aa64782591557bd5872713e9a15d3f1c9

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