Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d01841a0304c162…

MALICIOUS

PDF

77.1 KB Created: 2021-03-25 12:11:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0e525845086076eb5763b5c88fae79cf SHA-1: 5f61626150fc1d254d474637716e8a24e6e907f8 SHA-256: 9d01841a0304c1625ea8f51347b67676265ab3996c1f1e8e28c87a44da3aad55
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crophysi.ru/wix?keyword=growth+mindset+worksheets+for+middle+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419851/normal_601218c19d0e1.pdfIn PDF document text
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/jubepek.pdfIn PDF document text
    • http://vufiwopader.medianewsonline.com/52608115415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_60584626f2485.pdfIn PDF document text
    • https://pidakulosa.weebly.com/uploads/1/3/4/3/134391257/lafimatexur-luweguzulidexob.pdfIn PDF document text
    • https://zudobusida.weebly.com/uploads/1/3/5/3/135330479/9191466.pdfIn PDF document text
    • http://xukosususif.medianewsonline.com/47940197564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496193/normal_5fe79ddb525d9.pdfIn PDF document text
    • http://kokulotasuz.mygamesonline.org/79012905407.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/bulizewaxufi.pdfIn PDF document text
    • https://niniteju.weebly.com/uploads/1/3/0/8/130814631/4757c5f434fe3.pdfIn PDF document text
    • https://vubumemor.weebly.com/uploads/1/3/4/0/134012760/7773643.pdfIn PDF document text
    • https://texipajil.weebly.com/uploads/1/3/4/5/134523085/8489575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476416/normal_601cbe79a31ae.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/44616642177.pdfIn PDF document text
    • http://lazotub.mywebcommunity.org/sedulexejibumorotiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451369/normal_6048d623f3889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zurovajij/flannel_sheets_full_size.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/22403336478.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/aix_for_dummies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/muzitozat.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/fegizutosoviv.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 5240 bytes
SHA-256: 32d99a29beb717403ce1f422185f92d797c5b6487ffad069e69a6bbb8f4d67b0
font_01_sfnt_off000100ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EE 11032 bytes
SHA-256: 204f406045eba9072d5b32c1be48d3af2d1eeca81f56690100b8d321ab83192c

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