Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc503950dc1ed8c3…

MALICIOUS

PDF

73.2 KB Created: 2020-12-18 07:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e993a330621158b26ac626c0e26d4f67 SHA-1: bfe383e579850234c2526dc890b98c5ae6a16fc8 SHA-256: dc503950dc1ed8c35b8df0c86c769701868f0a1a70eb82a7091702a565c55c01
214 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with one critical heuristic specifically flagging a link to known malicious redirector infrastructure. The ML classifier and ClamAV also strongly indicate maliciousness. While no scripts were extracted, the presence of embedded URLs and the nature of the heuristics suggest the primary goal is to lure the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=merge+dragons+chest+wiki In PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7702792.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc59dea6609fd0ee7b1a6c7/t/5fd6194596ed101a3e37901d/1607866694481/vijexavulop.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/the_deep_dive_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcaa3a75-f7ac-4c06-9240-d8f1f4820437/15045621049.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/54470111335.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/raxamejerozodigajaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/contaminacion_del_aire_definicion.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e8305687f52b6b812c21/t/5fc287394e98326c026295f8/1606584123496/fodavesumum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b96763fd-0c4f-4406-8b7b-fe1e956d641d/rawomikovat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc580655e8e827d42ad0269/t/5fcf3a2bfaf0bc04d1c7b6cc/1607416364247/servpro_appleton_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/91264239529.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc688e8df132613bbe46c88/t/5fcf10eb798354522d07b1f3/1607405804686/82547180689.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b42eab79f442f2353307/t/5fcb55c79708706f3999b747/1607161292632/beautiful_girl_in_saree_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/automation_engineer_job_description.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12ec9f7cf8c75402cc175/t/5fc8636e6031f473861e6984/1606968174526/wyze_discount_code_2020_september.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfa2218e72e5fdb9cb2e6/1606285859838/xufoponoxuzabuvapewan.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_off0000df38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF38 5328 bytes
SHA-256: e4bbfd02d41998c43af767fa5d17a8b6760dd5c6adf6567ffca709472a183e01
font_01_sfnt_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 11252 bytes
SHA-256: f03180ca55d3292c4ef9e3cbc31da05eda75c4a771971bb49661761f4337d361

Open this report in the interactive analyzer, or submit your own file for analysis.