Malicious PDF — malware analysis report

Static analysis result for SHA-256 2460dbd6623dc6a0…

MALICIOUS

PDF

77.6 KB Created: 2021-03-22 20:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 33b36a50a7dcce1021ad17e5a9db71cb SHA-1: 5b508d1b8380886f1d51b7b72fa2b19f6e251b7e SHA-256: 2460dbd6623dc6a085aab2bd6a781983523c76cbf6f91ce0dda8e33d8cbb7a1f
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 0.9997

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/strik?utm_term=why+does+my+roomba+not+charge PDF link annotation
    • http://mikazuxo.mypressonline.com/cambridge_primary_science_stage_5_teacher_s_resource_book_free.pdfIn PDF document text
    • http://bonugonir.22web.org/12413406413.pdfIn PDF document text
    • http://bawazofo.getenjoyment.net/kimakavar.pdfIn PDF document text
    • https://cdn.sqhk.co/dojoxuwote/jhaO6KG/fogugurewesomebajizojoded.pdfIn PDF document text
    • http://winoraama.website/repuestos_de_silla_de_ruedas_invacar9gh0f.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/hdiaWha/business_insider_stock_market_crash_expert_sees_depression.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473637/normal_5fc9dd7613d8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5fe0e7367fc79.pdfIn PDF document text
    • http://omoikiri.info/lenovo_t430_docking_stationdufpa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415077/normal_603a00f30f49b.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/hi1gehf/sobiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369161/normal_5fe58a480a20e.pdfIn PDF document text
    • http://misirabul.22web.org/josh_groban_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5fceb5ea76a13.pdfIn PDF document text
    • http://boevoenlp.com/gixekijotugisusezeriq3t1p.pdfIn PDF document text
    • http://rowozogano.22web.org/how_to_wear_a_mask_and_not_fog_your_glasses.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lufiwivumijej.myartsonline.com/vowikokelokudererozotadop.pdfIn PDF document text
    • http://kadebenatoloxib.rf.gd/nizapora.pdfIn PDF document text
    • http://kaderuzaxaje.rf.gd/79713598792.pdfIn PDF document text
    • http://sogulonogob.epizy.com/letter_of_interest_template_google_docs.pdfIn PDF document text
    • http://wozabuposeg.epizy.com/72403499996.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_off0000efd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 5576 bytes
SHA-256: 4cf4ed239c0c3481bfc0197033bac626f57ba06f567e575ceae09362c4b5e05d
font_01_sfnt_off000102b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 10788 bytes
SHA-256: 999cb01f3e3f3e859f19547c47278bc7d059137debd3c0f2c954574468dd223b

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