Malicious PDF — malware analysis report

Static analysis result for SHA-256 565286c5870ed34d…

MALICIOUS

PDF

78.9 KB Created: 2021-04-07 13:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 632fb4420406cfe765fcff35d1e19829 SHA-1: 5843248661c7e9edafed83a398431656edf8be43 SHA-256: 565286c5870ed34d3599f9166ed14be0ea1d98044e42bde3a477f6e8a7845342
186 Risk Score

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 0.9991

Heuristics 6

  • 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 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.
  • 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://xezojetit.ru/award?keyword=time+value+of+money+pdf PDF link annotation
    • https://lupirolawa.weebly.com/uploads/1/3/1/4/131453436/9079899.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/basic_accounting_in_tally_erp_9.pdfIn PDF document text
    • http://kunewalijaxuna.getenjoyment.net/vunijobizisujumibemamoxa.pdfIn PDF document text
    • https://gariligiradafa.weebly.com/uploads/1/3/4/0/134041078/donojidinaxitosinat.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/fogelafofoz.pdfIn PDF document text
    • https://rivibesosad.weebly.com/uploads/1/3/4/5/134529272/pidolegirikibe-diwataz-guberurivedib.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/critical_discourse_analysis_book.pdfIn PDF document text
    • http://wunuvuzixuxi.getenjoyment.net/nuxako.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cd4737c0-2dd7-48ee-8ca2-bc30c8c882dc/declaration_under_penalty_of_perjury_nevada.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_67a75c08235146ad9621bb8af637796d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a16ac14-f635-4904-bc69-6fe4fa637b39/what_order_are_the_ranks_in_the_army.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c415e66-8adc-481f-a55f-aa3db333a4ad/gujawamukazeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f715fe-4461-4b6e-a125-5d24932b316f/nupezizok.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_09f7b0a80f394feab8a1eedce9cc236b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7837c3ac-d28a-41f6-8cce-c8d242aa2953/whirlpool_refrigerator_water_filter_replacement_video.pdfIn PDF document text
    • http://xutenujute.myartsonline.com/toeic_speaking_actual_test.pdfIn PDF document text
    • http://mewabetowa.myartsonline.com/zafuperuwukuxe.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_b23b8814415c42b18316b5be870a00c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c547f69-85a8-4ad8-8583-dc3bfa8e7504/pusefivonuvanuzom.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/balancing_chemical_equations_tutorial.pdfIn PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_cb05fb43b61341c49ac2526e7aa7333a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2379ad5-ecd4-4e12-8460-036f062b90ec/how_to_open_a_sentry_safe_sfw123cs_without_the_combination.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28a066f-79a7-4a27-b30c-ec0f63783996/download_driver_hp_laserjet_3015_windows_7_64_bit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA67 4828 bytes
SHA-256: adfded7493fa9b51420ec0304194b6558f09686b85685a7a00d367857190845e
font_01_sfnt_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 10504 bytes
SHA-256: 07b49c65baa5c3cd18904f46a9018a4f9b4655d11f453140d0d5797b4b73a6b5
font_02_sfnt_off00011eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f