Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbeb9f507144a965…

MALICIOUS

PDF

73.3 KB Created: 2021-06-04 07:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bce8ba02fb2811d789f94965b69056f1 SHA-1: 7393a6e697b9462f131b3c407c5b2f9b16520a6f SHA-256: bbeb9f507144a965b77fac624209c45d40d998da62d8af3c5437b59c56e73efa
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://synerhu.ru/pbw?utm_term=love+in+time+of+cholera+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381105/normal_603091cbb2e54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_60299a2c8c18f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5fc57545b8dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_604033756301b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460072/normal_5ff47aa873237.pdfIn PDF document text
    • https://rakositove.weebly.com/uploads/1/3/4/5/134595637/c3f088b91904e6.pdfIn PDF document text
    • https://gopiwalugase.weebly.com/uploads/1/3/0/7/130738825/vedizo_dumigejomuwidov_matazewupuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_605a7c51674cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377905/normal_60094b1911a9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_602ec4f700427.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462379/normal_5fddad96cc8a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368230/normal_5fee7e1f149ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sujagajo.pbworks.com/f/subway_surfers_game_for_pc_free_download.pdfIn PDF document text
    • http://sagidetubi.pbworks.com/f/cambridge_pet_sample_test.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/w/file/fetch/144477987/what_are_the_differences_between_capitalism_and_communism_during_the_cold_war.pdfIn PDF document text
    • http://gatunam.pbworks.com/f/padokufaxowebez.pdfIn PDF document text
    • http://ronakiko.pbworks.com/w/file/fetch/144542109/what_does_it_mean_when_my_vape_flashes_green.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/f/what_bank_statement_is_needed_for_rental_application.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_off0000e401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE401 5248 bytes
SHA-256: dd6b439f02592f69e462b9559802c52c4df8900087951d23d8659cdeae0cd77a
font_01_sfnt_off0000f5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C1 9984 bytes
SHA-256: 68d1ac693a1180e32f4a1845b4975ca269a9310d7e93195bd21ccfdd58d26a80

Open this report in the interactive analyzer, or submit your own file for analysis.