Malicious PDF — malware analysis report

Static analysis result for SHA-256 151af6a2e5ee33f6…

MALICIOUS

PDF

82.4 KB Created: 2021-04-06 00:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 57660065705680ea3cf655adfbbb00a6 SHA-1: 1ccca96720e3de2c2652a6eca20dfd8ae2ae4f54 SHA-256: 151af6a2e5ee33f624856f4c21f21e91a2b414b3a97da0fa8313eaf7af7d749e
134 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs, with one specifically pointing to 'ponafet.ru/award'. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to business plans or proposals, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ponafet.ru/award?keyword=business+plan+project+proposal+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422884/normal_6031afe465039.pdfIn PDF document text
    • https://gosupafitowiru.weebly.com/uploads/1/3/4/6/134673249/muxetabekutuxofonizu.pdfIn PDF document text
    • http://joramadubazi.22web.org/alpha_word_meaning_in_malayalam.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/can_you_day_trade_stocks_on_robinhood.pdfIn PDF document text
    • https://xevivipemasap.weebly.com/uploads/1/3/4/4/134481894/821fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470981/normal_5ffa026e5ff1c.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/bawajibisewulavumeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420764/normal_600af5038c2cd.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/jaxuwukofatifisedawezudaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tutoxalas.rf.gd/54956149944.pdfIn PDF document text
    • http://safubifulaxoxe.rf.gd/79889354006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f358cd2-8fbb-45af-835e-e201037bc576/xegavosimetisuboponen.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/adhyatma_ramayana_telugu.pdfIn PDF document text
    • http://mapureju.epizy.com/learn_korean_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c34e77ec-1141-43c6-b532-adfe56c77114/what_is_subject_terminology_in_english_literature.pdfIn PDF document text
    • http://loxokomefabumov.epizy.com/edgar_allan_poe_libro_el_gato_negro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 5156 bytes
SHA-256: 06e5d9303b50829c0e08efb11ff96ab772c81b069ce5a005759f0f8a8ef9f4f3
font_01_sfnt_off00010a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A67 10556 bytes
SHA-256: f2c11dbfd3e5a77a979ef18cced414220521c1a07faaa3fa170418ace8d1a1f6
font_02_sfnt_off00012e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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