Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c4665d10520d87…

MALICIOUS

PDF

75.1 KB Created: 2021-03-28 16:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9c5abbe8f1bf436436bd19af55a76d7d SHA-1: f044752772a99c18e85d93496bf7376e11a7babc SHA-256: d9c4665d10520d87657cb267eb0bf6e667ca23c437cf28c2c1658dbc5ac7af94
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. While the document body contains seemingly innocuous text about making a smoothie, the embedded links and heuristic firings point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://jottigo.ru/wb?keyword=how%20to%20make%20a%20smoothie%20with%20frozen%20fruit%20yogurt%20and%20orange%20juice PDF link annotation
    • http://copyright-securityx.com/ejemplo_de_estudio_de_factibilidad_de_un_proyecto_de_inversionil7js.pdfIn PDF document text
    • http://italysummer.space/surfboard_sb6141_change_mac_address9sb5n.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/25382575390.pdfIn PDF document text
    • http://3bki.ru/21757647158s64gw.pdfIn PDF document text
    • http://propovar.ru/499375000317urdc.pdfIn PDF document text
    • https://devopududifuwet.weebly.com/uploads/1/3/2/6/132696325/tevupumaj.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/1602951.pdfIn PDF document text
    • http://antonioit.fun/kojaks8e0f.pdfIn PDF document text
    • http://zebisol.mypressonline.com/don_look_back_book_cover_coldplay.pdfIn PDF document text
    • https://zoredufuno.weebly.com/uploads/1/3/4/6/134638801/4903950.pdfIn PDF document text
    • https://sunenuno.weebly.com/uploads/1/3/5/3/135319001/7837166.pdfIn PDF document text
    • https://gidiwukos.weebly.com/uploads/1/3/1/3/131381706/gurufavikuru-muwad.pdfIn PDF document text
    • https://tafulagi.weebly.com/uploads/1/3/4/6/134608062/nojaboravuve.pdfIn PDF document text
    • https://jumolemema.weebly.com/uploads/1/3/4/8/134853288/279981.pdfIn PDF document text
    • http://regsenatvumen.website/2164079543qechz.pdfIn PDF document text
    • http://nariwunuzaw.scienceontheweb.net/how_to_switch_to_hdmi_on_samsung_tv.pdfIn PDF document text
    • https://jaxuvoxet.weebly.com/uploads/1/3/5/9/135979876/9658a29ab.pdfIn PDF document text
    • http://kelimap.mywebcommunity.org/glossary_of_economics_terms.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/b714d0.pdfIn PDF document text
    • https://rijozixofufake.weebly.com/uploads/1/3/4/5/134509282/puzizobap.pdfIn PDF document text
    • https://fisuzawagowesus.weebly.com/uploads/1/3/1/8/131857314/babutavoj.pdfIn PDF document text
    • https://soxupewo.weebly.com/uploads/1/3/4/3/134392520/wupajawalulebuzetiru.pdfIn PDF document text
    • http://everydayy.fun/gupixivojosekewm4emj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nevafofuvabovid.atwebpages.com/likifixojuv.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_off0000e6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 5748 bytes
SHA-256: 3659e6a59de96a7fda0c947bd01e8065a5ab25d3c0205fecf9d37749e7ac9065
font_01_sfnt_off0000fa45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA45 10652 bytes
SHA-256: 0d9b651658e4a353d3c7c69dd74eed3319d778e539c82edaf673eeaa43f93817