Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde33ce45693fe85…

MALICIOUS

PDF

88.1 KB Created: 2021-03-14 02:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cc8cc2adff6915ee466df8a2552892f3 SHA-1: 1d28736eceac899ba8963ce028321e10a4e146e5 SHA-256: bde33ce45693fe85931eb435af44434021e6f77e88f1367516f5262115aac3ab
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with one pointing to a suspicious URL that appears to be part of a link farm. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document's primary purpose is to redirect users to potentially harmful external sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://jumiwimov.ru/wix?keyword=slot+machine+locations+mafia+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417329/normal_6028742ce9f2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467975/normal_60314af4b36c5.pdfIn PDF document text
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/vobabegixewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426972/normal_5ffbca67326f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_602429e844a68.pdfIn PDF document text
    • https://bupimapigi.weebly.com/uploads/1/3/1/3/131383283/vudipowaje_sipifunis_suvilubij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384652/normal_60298ae349adf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449183/normal_60489acf02a8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464077/normal_6015f40ac49c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475380/normal_60090af7413e5.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/1148908.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467017/normal_5fdd7f4e03569.pdfIn PDF document text
    • https://xufujume.weebly.com/uploads/1/3/4/8/134851049/1c2b5472.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5fe125f38ce1d.pdfIn PDF document text
    • https://rinuvigilositu.weebly.com/uploads/1/3/4/4/134463450/2418d145af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_603f498eec676.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500438/normal_5fcd08841f7d2.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/6510ea9.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/tivoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419441/normal_603b7deb661ae.pdfIn PDF document text
    • https://xukizawumu.weebly.com/uploads/1/3/1/3/131380236/seduwapokiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469350/normal_602f08df093c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7df9b38-41ba-4b34-9230-f3cdd41477a4/how_do_you_assess_pain_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66139f08-2fd4-4af7-b282-2615bdc5dc3a/i_cant_make_you_love_me_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75948837-2f41-48a3-a6b7-fb4d0860964d/how_to_clear_memory_on_omron_blood_pressure_monitor_bp786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b04bdd39-73f2-445e-8755-56487e526005/verbos_regulares_en_ingles_mas_usados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c9ef39-f163-4e95-972a-187e8bfcf467/73420718890.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_off00011bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF8 5292 bytes
SHA-256: 1e694f4fdeeb4df5e0ec775986056600555e82e95a0facefb1c8505d48630867
font_01_sfnt_off00012dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD3 10836 bytes
SHA-256: e511395bec4b87e36d63dce43f26b4ff3b691e29242c6ce42a8c543f36a94c10

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