Malicious PDF — malware analysis report

Static analysis result for SHA-256 9612eceea8792e63…

MALICIOUS

PDF

71.8 KB Created: 2021-03-04 22:29:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b03f5de8335487940cca0d0f37d6455b SHA-1: 03a9e57503ab2367944ea7696310eaf592e9f681 SHA-256: 9612eceea8792e635e7ece478f75e942e5e2196bbae702909fc59418532418bd
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains or redirectors, indicating a link farm designed to direct users to potentially malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and the ML classifier also flagged it with high confidence. While no scripts were directly extracted, the structure and heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://ponafet.ru/123?utm_term=magone+bpr40+radio PDF link annotation
    • http://nutosuvitiraj.scienceontheweb.net/sony_str-k750p_manual_espaol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423699/normal_6022cc8e57faf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_602dd4756e0d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_600c99c1ef00b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422908/normal_6008b18aa01b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490263/normal_603ffa1615e25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446270/normal_60109303dfec7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453528/normal_5fc649bce4503.pdfIn PDF document text
    • https://sezijaxafiv.weebly.com/uploads/1/3/1/6/131637080/b3f5f70ddac2baf.pdfIn PDF document text
    • https://motaxajofepox.weebly.com/uploads/1/3/1/3/131381237/6085225.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fedad465c0c1.pdfIn PDF document text
    • https://libufuvebugun.weebly.com/uploads/1/3/1/4/131406816/tevakokexapefad.pdfIn PDF document text
    • https://lulujazopo.weebly.com/uploads/1/3/4/7/134769354/a275095f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5fe8ac391bb84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_94be0eb79ae2466298f6877c7eebbfe8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/488bdb2b-2781-4b5d-a7f3-ee9956eb71d0/50219161256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4cd007-5920-4103-a4f8-4a922b05c1cb/kerutumosuto.pdfIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_aff021386c184b59be9187f784c8c269.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbf20ce-4d40-4e55-a41f-187eb7ec031c/is_chniby_demo_koi_ga_shitai_on_netflix.pdfIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_dde8e1f2c6b449f9b4f0eba7e8b0f9a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eded03c6-e24f-4eab-8659-76152fcb9339/ar_15_blueprints_3d_printer.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_367a571642324499841e2506ac9ec202.pdf?index=trueIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/29151593452.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/99084957009.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_c015cc6089c34a20ba36e45e5f6c6b53.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/759ffad6-c2c3-41ec-9625-1bd8a43223ef/death_note_light_up_the_new_world_characters.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_off0000d9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B2 5292 bytes
SHA-256: 83bb9f75c9d44574896a2615b37ce2bf22a377a62fec1ab9b07d9b48cf40db2e
font_01_sfnt_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 10896 bytes
SHA-256: 65faa5760febb099851d065712c35487ffcdc65f5cc4bdd6abe951ef483d869e