Malicious PDF — malware analysis report

Static analysis result for SHA-256 909bd9771a0e1121…

MALICIOUS

PDF

84.5 KB Created: 2021-03-16 05:27:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 158e49e921928bb190524314543a1da9 SHA-1: 424790638f0e300a2f1fd09de8a314c58cdfffa5 SHA-256: 909bd9771a0e11210eac53dd8334f19fc10bea2a7e04493d895c0cfa35ddf1e1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of a 'download' button lure further supports a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/strik?utm_term=storyboarding+tools+free PDF link annotation
    • https://nirotagikul.weebly.com/uploads/1/3/5/9/135992947/vabuwisadudup_tonozasakisikap_zituwutajosakon.pdfIn PDF document text
    • https://getugegifajit.weebly.com/uploads/1/3/4/4/134481189/gajiliposokudogami.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxunafifu/hipSiaN/slicer_machine_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/XgiS8ie/zagopa.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/fPhgghL/star_wars_cast_darth_vader_voice.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/gcZGBtz/undertale_megalovania_piano_tiles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_f3ed924781d446adac6176658b06ae5c.pdf?index=trueIn PDF document text
    • https://78ee58ad-4251-4cb6-9d9e-6f806931ac90.filesusr.com/ugd/b6b4e8_da8be0d5efde47e5bd427a5a800b741f.pdf?index=trueIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_b8e90880bdc441e2986639c50802e2c2.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_cb0eb685d97f4ffdb9433b5cbfc313b7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a600c8-bcd8-4ff5-bd39-164b95644d1a/55816627914.pdfIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_668ff9fffb0f4e22b9c5db82450bc8f5.pdf?index=trueIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_4e6e244864a14af9bf690a6b840848e4.pdf?index=trueIn PDF document text
    • https://a96990da-dd17-4b11-844c-aba2d588d1b6.filesusr.com/ugd/5e5e7b_9d175ba89a56438aaf0cefe9472ab18d.pdf?index=trueIn PDF document text
    • https://b3df6b87-ca8d-4c26-b815-8c697753997b.filesusr.com/ugd/896a32_410de43ea0cf47df9efbd7a546a0f102.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/786f827f-9d52-4839-9581-24bf73273834/kitchenaid_mini_mixer_white.pdfIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_4009f66cd74644609af3b73a6d7e3f3f.pdf?index=trueIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_33f4bbd92e504304bc347d46ffbb0474.pdf?index=trueIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_b7e585ae7d714ecdadd2ab8f4dcf5315.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5326e6ab-8db7-432e-877d-ed49b2c0ef69/what_is_the_ugliest_bird_on_earth.pdfIn PDF document text
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_eb3e819a871e499ea73f965d1eba1922.pdf?index=trueIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_c6e5f9d0650a4b84b3feb15cebbcb8e3.pdf?index=trueIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_8a2d58b39ac44e64ac53cf55ed07ddcc.pdf?index=trueIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_c66f62b447754ad8a89265eb7d8cb558.pdf?index=trueIn 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_off00010bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB9 5420 bytes
SHA-256: 112d8f02be8aee8011cc46db8bc9f62427a908c831b2dbeb8f979f2e23ef06be
font_01_sfnt_off00011e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3C 11176 bytes
SHA-256: 11ac66cde022392cde21dd8ae5679083e33cc318a5b1dc58d0f2a82767105b43