Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2b75c17e6d4dc4…

MALICIOUS

PDF

94.7 KB Created: 2021-02-20 07:35:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 873e8c9e59fc98ba4804cabeec3790ef SHA-1: bb3892fd81b0248eb167b37bde1c19e459eaf553 SHA-256: 0a2b75c17e6d4dc4f77754267ac519b6206ef11e4c9d3244ae439b3304156e70
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or disposable hosting. The heuristic firings indicate this is a link farm designed to direct users to harmful sites. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crophysi.ru/123?utm_term=what+is+the+best+color+for+kitchenaid+mixer In PDF document text
    • https://zumaboletafu.weebly.com/uploads/1/3/1/4/131454272/luteze-gewil-kasowifole.pdfIn PDF document text
    • https://pabebubi.weebly.com/uploads/1/3/2/6/132695301/vawuvolozewe.pdfIn PDF document text
    • http://santand-es.com/cranial_nerves_function_and_dysfunctionyg4k4.pdfIn PDF document text
    • https://pekudexuvu.weebly.com/uploads/1/3/1/4/131437333/zimosilamu.pdfIn PDF document text
    • http://axecheat6.xyz/fimali74g6r.pdfIn PDF document text
    • http://hookup754.fun/angular_component_template_filefi8in.pdfIn PDF document text
    • https://kowuzuworos.weebly.com/uploads/1/3/2/6/132682574/menokibu-kokurajonurex.pdfIn PDF document text
    • http://lazerepil.site/jolufidetuxobix567qv.pdfIn PDF document text
    • https://wigimosasalak.weebly.com/uploads/1/3/2/8/132814057/jitejogilu.pdfIn PDF document text
    • https://likixadukevagal.weebly.com/uploads/1/3/4/7/134700169/dorimidu.pdfIn PDF document text
    • https://guxofavopadowan.weebly.com/uploads/1/3/5/9/135988616/1b740496aca5aa.pdfIn PDF document text
    • https://dinorega.weebly.com/uploads/1/3/3/9/133999175/libuvenusina_wuguwupele.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/lagubeze.pdfIn PDF document text
    • https://samabuwe.weebly.com/uploads/1/3/0/7/130739499/rukowowidaram.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/befafuni/edelrid_mega_jul_guide_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/felixipadefifuwuzit.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/43643254522.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/best_mind_games_for_pc_free.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_off000133ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AB 5548 bytes
SHA-256: 3b3fd9a1f92c4a51062ab688a814d5dacad0becd64d8f8e233d4dcb64e1df789
font_01_sfnt_off00014666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14666 11384 bytes
SHA-256: 2c51b588c1e9845bc9b8158f55f1ea5cbbfa6b7a6469710d4d393212a4007aca

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