Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9b2c0771328de4…

MALICIOUS

PDF

67.1 KB Created: 2020-11-17 14:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 53a35f157927c62d01247556e827a8d1 SHA-1: 1ecd144504451fc7bbb90600faeb01f88054d77c SHA-256: 2e9b2c0771328de4f391d58fceead0f0a35e0dc7b07274246ebdc3419788e0c1
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The presence of numerous external PDF links, including one pointing to a potentially malicious redirector, suggests an attempt to direct users to harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://cctraff.ru/strik?utm_term=gba+rom+pokemon+crystal In PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/joguvagisixovej_mejegajawevuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f87c2eb8d9a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f91bf4715704.pdfIn PDF document text
    • https://satatemusuk.weebly.com/uploads/1/3/4/3/134311800/soxuvosipisoxomab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_5fac38087e5b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_5fa7ebbb4fcba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5f9298c128283.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/goviwigax/gramsci_intellectuals.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/73048439528.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/fortnite_accounts_generator_legit.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/autocad_2017_import_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/julius_caesar_study_guide_act_2_scene_2.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/binabenimexore.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/11474922461.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_off0000c966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC966 5416 bytes
SHA-256: 7021bd1df0f2d7b392e6236b57bb7c59a8fde7f8fa58d89d24a294e7a830bc10
font_01_sfnt_off0000dbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC6 10692 bytes
SHA-256: dfcd06d1c793f71e85e0b9e7088f5c3606053a49706451db39ce6be103ae4f34

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