Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a0be802a2335a8…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 07:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f77b4ebba526901af77a8e9e58e142af SHA-1: 1a19371a18130ae2971dbcd008ffe4e017ac7fce SHA-256: 03a0be802a2335a8b10b42826e69f422c0b321279bc72a8af60a325c4fa57f27
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, suggests a lure related to a 'coupon code', aligning with phishing tactics. The presence of multiple disposable domains and link farms further supports a malicious intent to distribute malware or phish for credentials.

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 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.
  • 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://yafferge.ru/strik?utm_term=touch+of+class+coupon+code+august+2019 In PDF document text
    • https://zulunapakaf.weebly.com/uploads/1/3/1/0/131070820/4731070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487381/normal_5fd3453a9b082.pdfIn PDF document text
    • http://accface.in/informao_nutricional_abobora_cabotiar0v1p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412905/normal_60050f31b52df.pdfIn PDF document text
    • http://mainsale.info/sniper_jungle_commando_counter_attacks2grnp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413862/normal_6026ffad37a88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fce83acb9017.pdfIn PDF document text
    • https://dadixuva.weebly.com/uploads/1/3/4/0/134018012/gumubib.pdfIn PDF document text
    • http://wssummer.space/19826814465zmm2y.pdfIn PDF document text
    • http://scm03.ru/editable_3_circle_venn_diagram_template4rpvn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466165/normal_5fe2443b440ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462732/normal_6030fd97353cc.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/luramamelolem/ratakizupekineluwesexoke.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_off0000d9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F7 5752 bytes
SHA-256: dc754f7b71942f08485b4fae66cc6e0b7dfd0aa6421e959874b4bb735c089641
font_01_sfnt_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 11704 bytes
SHA-256: 60eca50dd7f898d93e1222d70211aa7a797f801f56f33f5096d2c6010d6463e9

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