Malicious PDF — malware analysis report

Static analysis result for SHA-256 9111bec6fa7a1b98…

MALICIOUS

PDF

83.2 KB Created: 2021-03-21 08:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fc5f13b7ad66d5951d0d7410d46d0fa7 SHA-1: 453d4ac97860865cb449cd510b4c693a2e540e61 SHA-256: 9111bec6fa7a1b989cad29878775a1c3721d3b0f442dca084b47e94049f70a15
226 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable hosting and suspicious domains, suggesting a link farm or phishing attempt. The presence of a "redeem code generator ps4" lure in the document body, combined with heuristics indicating suspicious and SEO-focused link farms, strongly suggests a phishing or malware distribution scheme. The ML classifier and ClamAV detection further corroborate the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/wix?keyword=redeem+code+generator+ps4 PDF link annotation
    • http://itverys.space/lidelejubakejqidi.pdfIn PDF document text
    • http://fitokaps.xyz/mugixisizojtrt5.pdfIn PDF document text
    • http://bet-info.ru/geronimo_stilton_books_order_india7q0zo.pdfIn PDF document text
    • http://ig-supportcenter.xyz/wamokomizefufov0qz7.pdfIn PDF document text
    • http://nufogikije.22web.org/88256210577.pdfIn PDF document text
    • http://doucheapp.xyz/zodamewixevujzs7v4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_b7fc40af88804342a6629b6ab9c899fb.pdf?index=trueIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_8f14923d39a144b9b26e004c3a569860.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapijifas/pioneering_portfolio_management.pdfIn PDF document text
    • http://weromewu.rf.gd/losing_my_lyrics_meaning.pdfIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_1aab4b1a0f7b4a7eadbd9f11d8a29e36.pdf?index=trueIn PDF document text
    • http://naresukewuvaz.epizy.com/murikupuse.pdfIn PDF document text
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_34ca447981d94bcf8e5e0c3d952f99a5.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_1129c2a064124e429c98f1f0db91a6a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/cloze_sentence_worksheets.pdfIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_de22bb79f75a4c2f9d87bea3765078b8.pdf?index=trueIn PDF document text
    • http://pevudavef.rf.gd/html5_template_code.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_1f3f211de1f9491fb153e43118c10a16.pdf?index=trueIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_9791d0dbc1444f5c952c709ac6549735.pdf?index=trueIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_90bf275ad08940f8ab82587f5d503040.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_02d9c3fa1b464ff898d610a1c8b84d75.pdf?index=trueIn PDF document text
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_f2b4f6895cf5478d9b03aac38b4fce58.pdf?index=trueIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_7b4029ad02be40d7894fe68af70950ab.pdf?index=trueIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_eed50cbaa66f4715b68c73eea8577912.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_off000106f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F8 5456 bytes
SHA-256: f2ac40ec81f27f42d666145dc97ba893b786ef634a8b2e6df65af14f04a1693c
font_01_sfnt_off0001197b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197B 10644 bytes
SHA-256: 6ba4104478d3186f29c138f4cede5759f0b33f4c13bb386c57df1a75209c0ed0