Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de1058e5d614c0a…

MALICIOUS

PDF

84.3 KB Created: 2021-02-25 00:22:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d58814053b0adcf5ff6acea3fdc83566 SHA-1: 46bc63f263b9bf7aedfec16f54766e4e447ac64a SHA-256: 1de1058e5d614c0a19a8dfa39c287b0a3283b6389399b94f16ab7b084f3cea43
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file exhibits multiple indicators of malicious activity, including brand impersonation for credential phishing (Chase) and the display of a fake CAPTCHA to trick users into executing actions. It contains numerous links, many pointing to disposable hosting, suggesting a link farm or redirection to malicious content. The ML classifier and ClamAV detection strongly indicate a phishing or trojanized PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://wovipoxutoluku.weebly.com/uploads/1/3/1/3/131383624/3973747.pdf.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://maypoin.ru/wix?keyword=tanki+online+crystal+generator+download+no+survey PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5fd203aa614e3.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/7hdicMJ/netflix_price_increase_2019.pdfIn PDF document text
    • http://banquepopulaire-fr.org/free_avast_antivirus_1_year_validitydb445.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/jjjchbW/horizon_chase_world_tour_mode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_6018f9d2b5e2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488335/normal_5fcb3b60afb88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451206/normal_6009084a5355c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_6015dba02f4bf.pdfIn PDF document text
    • https://wovipoxutoluku.weebly.com/uploads/1/3/1/3/131383624/3973747.pdfIn PDF document text
    • http://cafechorsu.ru/android_ndk_camera_githubmccl6.pdfIn PDF document text
    • http://reduslim-shopofficial.site/sojerumuzoxojozyk3zj.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/zinedu.pdfIn PDF document text
    • https://jikesisepam.weebly.com/uploads/1/3/1/4/131406861/2747062.pdfIn PDF document text
    • https://nojonepidafajik.weebly.com/uploads/1/3/0/7/130775859/kijaz.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/YmBia6t/woodcutting_tool_crossword_clue.pdfIn PDF document text
    • https://jaxanawunolat.weebly.com/uploads/1/3/0/7/130739567/gawiwasemaxo.pdfIn PDF document text
    • https://nirodafudo.weebly.com/uploads/1/3/4/6/134697392/8355040.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/dhfWgcX/wixurekoronoguzumob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_6014d6772e3cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71E 6568 bytes
SHA-256: 792e288023e4fbe73a0351c4e4cf94c19217598e688914c0413f09f13c1160d5
font_01_sfnt_off0000f76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 5372 bytes
SHA-256: f2f68936b93f94bb37242dddc06cb7de0b56e16fe730c92e8f3880fc1ad61ed0
font_02_sfnt_off000109e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E2 10412 bytes
SHA-256: d93d323390c3472c7241b42680192cfc1633ef71bb21472fd1e0e642d17c0807
font_03_sfnt_off00012dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAC 16096 bytes
SHA-256: 43254c6337662e76ed67025008a42d76121bee43b935a85a5f582473253d5118

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