Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2df0fd5c7c2d3f…

MALICIOUS

PDF

78.0 KB Created: 2021-03-09 03:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8aa6a8b854579cdf490ef094b4d4524c SHA-1: 45caf52c210cfcb4423928978a54f3b2fd587695 SHA-256: 7b2df0fd5c7c2d3fb512c08b23773c06a226e3c9a0c38af3757533103799a5e2
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many pointing to disposable hosting, and one critical link to a known malicious redirector. This indicates a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature, suggesting it exploits PDF vulnerabilities to execute code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=multivariate+data+analysis+hair+7th+edition+pdf In PDF document text
    • https://fepexugoroba.weebly.com/uploads/1/3/4/4/134469665/gufoze.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/9ejegcf/74691897244.pdfIn PDF document text
    • https://rativebexatu.weebly.com/uploads/1/3/2/3/132302992/ab2381ac.pdfIn PDF document text
    • http://fb-ig-violation.com/wijegit4a193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5fe630b4b4441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386591/normal_5fe383c1e8442.pdfIn PDF document text
    • https://tugufotekaluxaz.weebly.com/uploads/1/3/4/8/134883762/16890.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373304/normal_5fe021fbc2540.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/CnPtgg0/pugavewibezibi.pdfIn PDF document text
    • http://tiktokhd.design/mapa_mundi_em_portuguesd9mhe.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/Oighgjh/haken_virus_sputnik.pdfIn PDF document text
    • https://cdn.sqhk.co/pitewomepe/WiigiP8/animal_coloring_book_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/ePZjjCM/draw_so_cute_ice_cream_pusheen.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/hcrV9jc/sojatefepilunu.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/XAhgUgg/super_loud_ringtones.pdfIn PDF document text
    • http://lessonsonline.site/matotaminajesolte0r6.pdfIn PDF document text
    • https://cdn.sqhk.co/jumunuji/fMMxXCn/74315220675.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/hhicZhh/lyrical_photo_status.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_600c53cc49d33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491450/normal_6002d2af20d35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_6263a545315c443f9ca477154dcf07f8.pdf?index=trueIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_74e52b796fcb4c85ac94b15fb31e30c0.pdf?index=trueIn PDF document text
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_94fe61019b61490ba97522858408bde1.pdf?index=trueIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_ea319b9232164a20ab2b7ae4f36dc6de.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 5260 bytes
SHA-256: 14f52e8f83001b404666aadf298ebf9ba6ed2419655a70ecb697b5420ae8c6d8
font_01_sfnt_off0000f8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F1 10308 bytes
SHA-256: aa70e4bc06c7bb0dadd808b472a85b128de27cc801e9181c05d61ebbe2aa85f8
font_02_sfnt_off00011c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C31 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f