Malicious PDF — malware analysis report

Static analysis result for SHA-256 d049eb61b7411ecf…

MALICIOUS

PDF

83.7 KB Created: 2021-01-16 14:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 89a021d1d3a764f15bdcbde2cb0e28a0 SHA-1: da08f0d00d0121f6b3fa8619a1cbd149e6597a6b SHA-256: d049eb61b7411ecf47735cdacb0c163074ac23e4a816c116a2e23dad6841b1d3
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms hosted on Weebly, suggesting an attempt to obscure malicious destinations. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffine.ru/aws?utm_term=free+annual+credit+report+south+africa In PDF document text
    • https://vipopatovosidop.weebly.com/uploads/1/3/0/7/130775456/kemafo.pdfIn PDF document text
    • https://xofiguguja.weebly.com/uploads/1/3/2/7/132710561/nozusudikep-volimewulo.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/nixigovovoji_rusoruvogemumu_fopofoku.pdfIn PDF document text
    • https://site-1179698.mozfiles.com/files/1179698/informational_process_analysis_essay_examples.pdfIn PDF document text
    • https://rovuxunezonode.weebly.com/uploads/1/3/4/4/134494657/79157449c3f0dd.pdfIn PDF document text
    • https://fodivavix.weebly.com/uploads/1/3/1/4/131483454/4740809.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/2473348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393791/normal_5fda2c9e90f8b.pdfIn PDF document text
    • https://cdn.sqhk.co/fosulavale/eehifjg/44881283492.pdfIn PDF document text
    • https://nipifofopofeduv.weebly.com/uploads/1/3/4/3/134338269/tozux.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://s3.amazonaws.com/sesafefanulokam/kapewomabopaluxolikuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/pengertian_atonia_uteri.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/minion_rush_hack_apk_6.9.0_e.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/mowewubaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 5080 bytes
SHA-256: 15b6b0988b040063131d37680ba9ba13277444d2a0cde459d9d8499b1ed40d7d
font_01_sfnt_off00010aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA2 11716 bytes
SHA-256: eb27c9dbfbd2fc448c117b87f506c8cf91ac4644ae58f6d9e9e466361c1cca93
font_02_sfnt_off000131a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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