Malicious PDF — malware analysis report

Static analysis result for SHA-256 e175919411d44a5e…

MALICIOUS

PDF

79.9 KB Created: 2021-04-15 17:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 02125c2782c26e30405f4692ba0eb164 SHA-1: 164a8b5d848a1e59d41ac60b1ff85bde406685bc SHA-256: e175919411d44a5e87659236020d3732ddabd18076889b764f7a451ef36fe9d0
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains a reference to 'Spider-Man animated series', likely a lure to attract clicks to the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=spider+man+animated+series+2017+full+episodes PDF link annotation
    • https://pebuzifidam.weebly.com/uploads/1/3/2/8/132815752/3384296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465403/normal_6030344d2c5d3.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/debadamifove.pdfIn PDF document text
    • https://folugaso.weebly.com/uploads/1/3/4/5/134503816/9490978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_603554d152382.pdfIn PDF document text
    • http://nusezuretoti.scienceontheweb.net/pdf_to_editable_word_doc_converter_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_604a159341d28.pdfIn PDF document text
    • http://edarudost.online/jufatepopezorczdhz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5fc9f60565560.pdfIn PDF document text
    • https://gudeworidive.weebly.com/uploads/1/3/4/7/134767917/7888759.pdfIn PDF document text
    • https://goradexajegofip.weebly.com/uploads/1/3/0/8/130874122/4776213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_6069ba01ed745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_6048c712b0a47.pdfIn PDF document text
    • http://prosucre.pro/82898508015hk8dt.pdfIn PDF document text
    • https://takotifisusa.weebly.com/uploads/1/3/4/4/134499816/7456959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450876/normal_6033447a1bbb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b89c0965-50b5-483f-b67e-52f573158f4f.filesusr.com/ugd/1e222e_d8bb55849f0841e6bc192753729afa0e.pdf?index=trueIn PDF document text
    • http://saxodanokijaj.atwebpages.com/what_is_forex_in_simple_terms.pdfIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_9cffbf84a21c4afb8b475fe7b28209a8.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_701ae69d91d44c43bf7597a91643ef47.pdf?index=trueIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_ebda1e539dbd49abbb79a82df7943b80.pdf?index=trueIn 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_off0000f7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D7 5696 bytes
SHA-256: 6c75a4c69bca443e6e14a2a3436e62e2d2a4cfe83d7e88124192f0335ab9b466
font_01_sfnt_off00010b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2D 10892 bytes
SHA-256: c262e3ef7cf09f0eca00f3d34b60385cea44dfe6c810f28759026462a70d6f36