Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aaf6111c8c6ca90…

MALICIOUS

PDF

123.2 KB Created: 2021-03-14 13:09:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 98f1cf9668dd056ef84352c7717bb259 SHA-1: eca2ee9116213f1ea78489a246c233eeb99a3648 SHA-256: 9aaf6111c8c6ca90ad8ec53acef8cf0a29e137f879e0f43c6384a998f7c988c7
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, including 'https://ponafet.ru/strik?utm_term=alimentos+y+bebidas+regionales+s.a+telefono', which are likely intended to redirect users to potentially harmful websites. The document body is heavily obfuscated, but the presence of multiple external links suggests a phishing or traffic-generation scheme.

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 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://ponafet.ru/strik?utm_term=alimentos+y+bebidas+regionales+s.a+telefono PDF link annotation
    • https://cdn.sqhk.co/nivavepe/jj0xidL/42705750553.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/vovanaselusi.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/iaoONhf/dark_side_of_the_moon_vinyl.pdfIn PDF document text
    • http://liberum.sportsontheweb.net/tolkien_beowulf.pdfIn PDF document text
    • https://cdn.sqhk.co/mizipudi/YEffGgg/new_super_mario_bros_secrets_world_1.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/active_vs_passive_voice_worksheet.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/what_is_chi_in_medical_terms.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/budidaya_azolla_microphylla.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/ejahfRP/falling_down_lyrics_selena_gomez.pdfIn PDF document text
    • http://netolenogafa.getenjoyment.net/71688583089.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/29553728329.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/0HBKjaY/ziwaban.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogosugo.onlinewebshop.net/basic_engineering_drawing_book_download.pdfIn PDF document text
    • http://vivetusukuv.onlinewebshop.net/angina_de_pecho_inestable_y_estable.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_8f9953e1b2de4ad298e4a835c0aebd54.pdf?index=trueIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_ada1ade5277a4c59a15dd6e607cc3d0f.pdf?index=trueIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_c93f22f294bb43ef8de6bb37727a0a15.pdf?index=trueIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_a43683428c82468292fb420fb791cb5c.pdf?index=trueIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/japavuwanamoto.pdfIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_15b3fcbdf79d470aaacd59c910ae1a89.pdf?index=trueIn PDF document text
    • https://a0e9597c-cfbb-4fc1-b0e0-47ed6411b148.filesusr.com/ugd/24269e_d48e35cb785f466c8a16dad94c9772cd.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_off00019f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F2B 5488 bytes
SHA-256: 60cbfb990e656947bdef618842e0babb72ea0136f06b4eeead08fdffe9da3e23
font_01_sfnt_off0001b1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1CA 13840 bytes
SHA-256: 6353c8c70bc7d1ba69ab6466da7ff07d2a0135cc0661f94a7beec66b014764aa