Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0975488540be5b…

MALICIOUS

PDF

80.7 KB Created: 2021-03-18 11:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 68009299400a45c0bd5bcd7b4733a28a SHA-1: 167de72dbc6b14c324c1276e15f7a32547ebe665 SHA-256: fc0975488540be5ba8df70aa6b86306974fea53653acf12b7588f25f994f720b
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/strik?utm_term=alan+watts+life+and+death+quotes PDF link annotation
    • http://fitness1.space/kazawotererenamedopalimoxtzsy.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/o_que__adsoro.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/kicifZR/word_family_games.pdfIn PDF document text
    • http://kigalasabipigo.medianewsonline.com/banach_space_in_functional_analysis.pdfIn PDF document text
    • http://yoga-italy.space/lizazukenalotaguzukikunoj9f5d9.pdfIn PDF document text
    • http://formblckr1.xyz/walemosadatapenejas44cf9.pdfIn PDF document text
    • http://ylyn.ru/cleenol_stainless_steel_polish_data_sheetz3nua.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/why_recycling_is_important_persuasive_speech.pdfIn PDF document text
    • http://opendouche.xyz/2898024824yugiy.pdfIn PDF document text
    • http://stepka2016.xyz/gowubopijejisokvszk9.pdfIn PDF document text
    • http://olipaka.xyz/82871144268g4clz.pdfIn PDF document text
    • http://selizixid.iblogger.org/xujunewupuvesi.pdfIn PDF document text
    • https://cdn.sqhk.co/kozosorole/ifKESmK/14029353567.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d050551-8509-493a-913c-e3d8e3de6c79/penonokakowuxedegawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82379f06-7066-4c83-b6a3-38569a59f140/machine_learning_scikit_learn_tutorial.pdfIn PDF document text
    • http://degepedafapuf.epizy.com/51592200701.pdfIn PDF document text
    • http://wagibederujejo.rf.gd/xikuvunegafigov.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_off0000fd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2D 5108 bytes
SHA-256: d37b9e981785aff694d14b79278596eb1321bdb3fe02a2dd5a794e440fd54889
font_01_sfnt_off00010e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9D 10924 bytes
SHA-256: 2ea7203cf33b3c101afef0742f927326d10a50fd7d385ac0cbe4ce3a69953525

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