Malicious PDF — malware analysis report

Static analysis result for SHA-256 232de5d3b44090ed…

MALICIOUS

PDF

75.7 KB Created: 2021-03-22 23:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45cf04f31a491a4d95a923ee94a026c0 SHA-1: 74d5ff78450fcbce56a74ca0dcb465e2d74d59a3 SHA-256: 232de5d3b44090ed8f25aa8e42bac0af863f9644e7007019a12fe10f2b489e90
156 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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/wix?keyword=lasa+2020+mexico+city PDF link annotation
    • https://nuvutujozexavu.weebly.com/uploads/1/3/4/1/134131277/4497331.pdfIn PDF document text
    • https://devanuwi.weebly.com/uploads/1/3/0/9/130969177/5416373.pdfIn PDF document text
    • https://judaromoperojog.weebly.com/uploads/1/3/2/6/132681758/jizanixodepofi_penimogoxir_xidafone_lodatotereji.pdfIn PDF document text
    • https://basupetuwesaf.weebly.com/uploads/1/3/0/7/130739706/wopasovikexumadepup.pdfIn PDF document text
    • https://tebafazar.weebly.com/uploads/1/3/4/2/134265880/fefuzewawenab_lidefezobona_kilomexum_vegekasowedan.pdfIn PDF document text
    • https://xanovisawedota.weebly.com/uploads/1/3/2/8/132816091/5363438.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368740/normal_6001ee8d9d8bd.pdfIn PDF document text
    • https://bebemabuvi.weebly.com/uploads/1/3/1/4/131453051/a9e55f943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5fd7daf7c4662.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/3d298dd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419846/normal_6029eef1ce229.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/9212631.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/3c64a59b-bce4-4e78-870d-8330cb9fe1b6/79668584532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48885beb-7ba2-4c26-97e7-bde9d82175fc/ratixudanemidasagimeg.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/mandarin_dragonet_care_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/21514247188.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/50_african_american_audition_monologues.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/kowiwosufusutukegixopap.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/lusaliwigedoxixada.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/40378536132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5eff5e-f071-4ed3-9507-24ba7781937f/emergency_kit_list.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/awareness_book_anthony_de_mello_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/sofosunusumobo.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/80490893517.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_off0000e847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE847 5204 bytes
SHA-256: 9a67ae84571f63ea0032240b37459634803f6fa8de8cb4c505c687f905c7096a
font_01_sfnt_off0000f9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F7 11580 bytes
SHA-256: eb5f178d51433d776f6d79ca2bb4d9465269b944ed8d403c72d90bdc3ca04d1a

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